FCC ID: 2AOKI-WFM38BUWG1 WF-M38B-UWG1,WF-M38B-UWG1(FCC/IC)

2021 08 24 10 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WiFi Module Integrated Bluetooth 2.1+EDR/4.2/5.0 Features Reserving System IEEE Std. 802.11a IEEE Std. 802.11b IEEE Std. 802.11g IEEE Std. 802.11n Bluetooth 2.1+EDR/4.2/5.0 Chip Solution Mediatek MT7638BUN Size 40.0mmx 35mm x 3.2mm Model Overview WF-M38B-UWG1 IEEE 802.11a/b/g/n 300Mbps 2.4G/5G Bluetooth2.1+EDR/4.2/5.0 3Mbps 2.4G

+IPEX 5V Sichuan AI-Link Technology Co.,Ltd. Add:

Anzhou,Industrial park,Mianyang,Sichuan

: +86-13881190925

http://www.ailinkiot.com WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 Feedback of customers Confirmation We accept the specification after Confirmed Customer name Customer signature Confirmation Date Please feed back this paper and first paper after your signature by the address,thanks!

ADD Anzhou,Industrial park,Mianyang,Sichuan Factory Sichuan AI-Link Technology Co.,Ltd. Approved Checked Product Designed WiFi Module Model Date WF-M38B-UWG1 2021-08-25 Sichuan AI-Link Technology Co.,Ltd. page 2 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 Record of Modification Reason of modification Serial number of modification No 1 2 3 4 5 Date of modification 2020/9/21 2020/12/03 2021/01/12 Main content of modification 1 2 3 2021/06/18 2021/08/24 Confirm Sichuan AI-Link Technology Co.,Ltd. page 3 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 1. Introduction WF-M38B-UWG1 module design is based on Mediatek MT7638BUN solution, The MT7638BUN is a highly integrated single chip which has built in a 2x2 dual-band wireless LAN radio and Bluetooth radio. It includes Bluetooth EDR and LE radio which complies with Bluetooth v2.1+EDR, v4.2, and v5.0. The Module is a highly integrated MAC/BBP and 2.4/5GHz PA/LNA single chip which supports a 300Mbps PHY rate. The Module is designed to support standard-based features in the areas of security, quality of service, and international regulations, giving end users the greatest performance anytime and in any circumstance. This documentation describes the engineering requirements specification. 1.1 RF module Overview The general HW architecture for the module is shown in Figure 1. This WLAN Module design is based on Mediatek MT7638BUN. It is a highly integrated single-chip MIMO(Multiple In Multiple Out) Wireless LAN (WLAN) network interface controller complying with the 802.11 specification and Bluetooth over USB interface. It combines a MAC, a 2T2R capable baseband, and RF in a single chip. An intelligent Wi-Fi/Bluetooth coexistence algorithm is implemented to provide the best harmonized Wi-Fi and Bluetooth radio performance. 5V 1.5V Internal DC/DC 2.4G TX0/RX0 1.2V 5G TX0/RX0 Internal LDO WF_ RFIO Dixplexer Antenna0 USB2.0 Interface MT7638BU N 2.4G TX1/RX1 5G TX1/RX1 WF_ RFIO Dixplexer Antenna1 2.4G TX2/RX2 Filter Filter BT_ RFIO 40MHz Antenna2 Figure 1 WF-M38B-UWG1 Block Diagram Sichuan AI-Link Technology Co.,Ltd. page 4 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 1.2 Specification reference This specification is based on additional references listed below. _ IEEE Std. 802.11a _ IEEE Std. 802.11b _ IEEE Std. 802.11g _ IEEE Std. 802.11n _ Bluetooth 2.1+EDR/4.2/5.0 1.3 System Functions Table1: General Specification as below:

Main Chipset Operating Frequency WiFi Standard Bluetooth Modulation Data rates Form factor Host Interface PCB Stack Dimension Antenna Operation Temperature Storage Temperature Operation Voltage Mediatek MT7638BUN 2.4G/5G 802.11a/b/g/n (2x2) 2.1+EDR/4.2/5.0 WIFI:11b: DBPSK, DQPSK and CCK and DSSS 11a/g: BPSK, QPSK, 16QAM, 64QAM and OFDM 11n: BPSK, QPSK, 16QAM, 64QAM and OFDM BT: FHSS,GFSK,DPSK,DQPSK 11b: 1, 2, 5.5 and 11Mbps 11a/g: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps 11n: MCS0~15, up to 300Mbps 9pins , USB 2.0 4-layers design Typical 40.0mmx 35mm x 3.2mm WIFI Internal/BT external Antennas Design 0 to +70

-15 to +45 5V +/-10%

Sichuan AI-Link Technology Co.,Ltd. page 5 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 2. Mechanical Specification 2.1 Mechanical Outline Drawing Typical Dimension (W x L ): 40.0mmx 35mm x 3.2mm General tolerance: 0. 3mm 2.2 Product Picture TOP VIEW BOTTOM VIEW PCB :

BOT PCB Sichuan AI-Link Technology Co.,Ltd. page 6 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 2.3 Pin define Pin 1 RST Reset 2 3 4 5 6 7 8 9 WIFI_WAKE GND DP DM GND BT_WAKE

+5V

+5V WIFI Wake up Ground connections USB positive differential data lines USB negative differential data lines Ground connections BT Wake up Power supply 5.0V is required Power supply 5.0V is required Sichuan AI-Link Technology Co.,Ltd. page 7 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3. Electrical Specification This Specification is based-on conductive DVT testing result. The extreme condition include overall temperature (0,+25,+40) and overall voltage (3.0V,3.3V,3.6V). 3. 1 IEEE 802.11g/a Section:

Items Specification Mode Channel Data rate TX Characteristics 1. Power Levels 1) 15dBm Target (For Each antenna port)

@ 11g/6Mbps~54Mbps 2) 14dBm Target (For Each antenna port)

@ 11a/6Mbps~54Mbps 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power 1) 6Mbps 2) 9Mbps 3) 12Mbps 4) 18Mbps 5) 24Mbps 6) 36Mbps 7) 48Mbps 8) 54Mbps 4. Frequency Error 1) IEEE802.11g 2) IEEE802.11a RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) 6Mbps (PER 10%) 2) 9Mbps (PER 10%) 3) 12Mbps (PER 10%) 4) 18Mbps (PER 10%) 5) 24Mbps (PER 10%) 6) 36Mbps (PER 10%) 7) 48Mbps (PER 10%) 8) 54Mbps (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11g 2) IEEE802.11a Contents IEEE802.11g & IEEE802.11a BPSK, QPSK, 16QAM, 64QAM and OFDM CH1 to CH11 @ 11g CH36,CH40,CH44,CH48 CH52,CH56,CH60,CH64,CH100,CH104,CH108,CH112, CH116,CH120,CH124,CH128,CH132,CH136,CH140 CH149,CH153.CH157,CH161,CH165@ 11a 6, 9, 12, 18, 24, 36, 48, 54Mbps Max. Remark Min. Typ. Unit 13 12 15 14

-25

-30 Min.

-20

-30

Typ.

17 16

-20

-28

-40

-5

-8

-10

-13

-16

-19

-22

-25 25 30 Max.

-82

-81

-79

-77

-74

-70

-66

-65

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 8 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.2 IEEE 802.11b Section:

Items Specification Mode Channel Data rate TX Characteristics Min. Contents IEEE802.11b DBPSK, DQPSK and CCK and DSSS CH1 to CH11 1, 2, 5.5, 11Mbps Max. Typ. Unit Remark 1. Power Levels(Calibrated) 1) 17dBm Target (For Each antenna port)

@1Mbps~11Mbps 2. Spectrum Mask @ Target Power 1) fc +/-11MHz to +/-22MHz 2) fc > +/-22MHz 3. Constellation Error(EVM) @ Target Power 1) 1Mbps 2) 2Mbps 3) 5.5Mbps 4) 11Mbps 4. Frequency Error RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) 1Mbps (FER 8%) 2) 2Mbps (FER 8%) 3) 5.5Mbps (FER 8%) 4) 11Mbps (FER 8%) 6. Maximum Input Level (FER 8%) 15 17 19 dBm

-25 Min.

-10

-20

Typ.

-83

-80

-79

-76

-30

-50

-10

-10

-10

-10 25 Max.

-76

-76

-76

-76

dBr dBr dB dB dB dB ppm Unit dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 9 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.3 IEEE 802.11n HT20 Section:

Items Specification Mode Channel Data rate (MCS index) TX Characteristics 1. Power Levels 1) 14dBm Target (For Each antenna port)

@ 2.4G/MCS0~MCS7 2) 13dBm Target (For Each antenna port)

@ 5G/MCS0~MCS7 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G Contents IEEE802.11n HT20 @ 2.4G IEEE802.11n HT20 @ 5G BPSK, QPSK, 16QAM, 64QAM and OFDM CH1to CH11 @ 2.4G CH36,CH40,CH44,CH48 CH52,CH56,CH60,CH64,CH100,CH104,CH108,CH112, CH116,CH120,CH124,CH128,CH132,CH136,CH140, CH149,CH153,CH157,CH161,CH165@ 5G MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 Max. Remark Typ. Min. Unit 12 11 14 13

16 15

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-25

-20 Min.

Typ. 25 20 Max.

-20

-30

-82

-79

-77

-74

-70

-66

-65

-64

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 10 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.4 IEEE 802.11n HT40 Section:

Items Specification Mode Channel Data rate (MCS index) TX Characteristics 1. Power Levels (Calibrated) 1) 14dBm Target (For Each antenna port)

@ 2.4G/MCS0~MCS7 2) 13dBm Target (For Each antenna port)

@ 5G/MCS0~MCS7 2. Spectrum Mask @ Target Power 1) at fc +/-21MHz 2) at fc +/-40MHz 3) at fc > +/-60MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level(PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G Contents IEEE802.11n HT40 @ 2.4G IEEE802.11n HT40 @ 5G BPSK, QPSK, 16QAM, 64QAM and OFDM CH3to CH9 @ 2.4G CH38,CH46,CH54,CH62,CH102,CH110,CH118,CH126, CH134,CH151,CH159 @ 5G MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 Max. Typ. Min. Unit Remark 12 11 14 13

16 15

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-25

-20 Min.

Typ. 25 20 Max.

-20

-30

-79

-76

-74

-71

-67

-63

-62

-61

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 11 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.6 Bluetooth Section:

Items Specification Mode Number of Channel Frequency Band 1. Output Power 2.Gain step 3. Receiver sensitivity (BER 0.1%) 4. Maximum usable signal (BER 0.1%) 5. C/I co-channel (BER<0.1%) 6. C/I 1MHz (BER<0.1%) 7. C/I 2MHz (BER<0.1%) 8. C/I3MHz (BER<0.1%) 9. C/I Image channel (BER<0.1%) 10. C/I Image 1MHz (BER<0.1%) 11. Inter-modulation 12. Out-of-band blocking 1). 30MHz to 2000MHz 2). 2000MHz to 2399MHz 3). 2498MHz to 3000MHz 4). 3000MHz to 12.75GHz 13. Modulation characteristics 1). f1avg 2). f2max (For at least 99.9% of all f2max) 3). f1avg /f2avg 14. ICFT 15. Carrier frequency drift 1). One slot packet (DH1) 2). Two slot packet (DH3) 3). Five slot packet (DH5) 4). Max drift rate 16. TX output spectrum(20dB bandwidth) 17. In-Band spurious emission 1). 2MHz offset 2). 3MHz offset 3). >3MHz offset Min. 4 2

-10

-27

-27

-10 140 115 0.8

-75

-25

-40

-40

Contents BT2.1+EDR/4.2/5.0 FHSS,GFSK,DPSK,DQPSK 79 Channels 2.402 GHz ~2.480GHz Unit dBm dB dBm Remark Typ. Max. 10 8

-80

11 0

-30

-40

-9

-20

7 4

-93.5

-5 4

-14

-42

-49

-25

-50

-13

157 140 0.98 20 15 15 15 6 922

-45

-48

-48

175

+75

+25

+40

+40 20 1000

-20

-40

-40 dB dB dB dB dB dB dB dBm dBm dBm dBm KHz KHz KHz KHz KHz KHz KHz KHz/50us KHz dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 12 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 4. Current consumption 4.1 WLAN current consumption Description Sleep moderadio off 2.4GHz RX power savingDTIM=1 2.4GHz RX activeHT20MCS15 2.4GHz TX CCK11Mbps@21dBm 2.4GHz TX HT20MCS15 @17.5dBm 2.4GHz TX HT20MCS8 @18dBm 5GHz VHT80 RX listen2RX 5GHz RX activeHT40MCS15 5GHz TX HT40MCS15 @ 15.5dBm 5GHz TX HT40MCS0@ 16.5dBm,2TX 4.2 Bluetooth current consumption Description Sleep moderadio off Bluetooth TX@9dBm Bluetooth RX Bluetooth SCO connectionHV3 packets + sniff mode

+ scanpage scan interval=1.28secinquiry scan interval=2.56ssniff interval=500ms Bluetooth page scan + inquiry scanpage scan interval=1.28secinquiry scan interval=2.56s Bluetooth page scanpage scan interval=1.28sec Note Average currentmA 1.5 3.3 144 403 496 520 152 191 698 723 Average currentmA 1.5 42 21 21 1.7 1.6 1 All result is measured provided VDD33 is 3.3V. Tx power is measured at antenna port. Temperature is 25. 2 Host interface is USB2.0 3 Duty cycle for TX/RX measurement is 100%

4 The chip variation is +/-15%

Sichuan AI-Link Technology Co.,Ltd. page 13 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 5. Software Requirements The driver supports the following operating systems: Linux, Microsoft Windows XP, Vista and Win7. Mfg. software tool is MT7638BUN_QA_Tool. 6. Key component List

1 2 MT7638BUN QFN PCB JUI7.820.0786 FR-4,4LAY 3 SMD3225-40M 40M 7. Antenna specification MTK Hosonic TXC NO. Type Antenna Project Code Gain Part No. 1 External PIFA Antenna 2.32 dBi(@2.4 ~ 2.5 GHz) 4.13 dBi(@5.15 ~ 5.85 GHz) TX-DM50@1000BD113B63M 2 External PIFA Antenna 1.72 dBi(@2.4 ~ 2.5 GHz) 2.57 dBi(@5.15 ~ 5.85 GHz) SLK-T3010-L-XI-B Sichuan AI-Link Technology Co.,Ltd. page 14 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 8. Packaging Information:

15 180 a) b) 22g c) 20300/;

d) 240mm*385mm*140mm;

e)

Sichuan AI-Link Technology Co.,Ltd. page 15 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 9. FCC Statement FCC regulatory compliance statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Warning: changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This Module complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Labelling Instruction for Host Product Integrator Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains FCC ID: 2AOKI- WFM38BUWG1 any similar wording that expresses the same meaning may be used. Installation Notice to Host Product Manufacturer The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or install module. The module is limited to installation in mobile application, a separate approval is required for all other operating configurations, including portable configurations with respect to 2.1093 and difference antenna configurations. Antenna Change Notice to Host manufacturer If you desire to increase antenna gain and either change antenna type or use same antenna type certified, a Class II permissive change application is required to be filed by us, or you (host manufacturer) can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application. FCC other Parts, Part 15B Compliance Requirements for Host product manufacturer This modular transmitter is only FCC authorized for the specific rule parts listed on our grant, host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. Host manufacturer in any case shall ensure host product which is installed and operating with the module is in compliant with Part 15B requirements. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Sichuan AI-Link Technology Co.,Ltd. page 16 of 17 WF-M38B-UWG1 IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 10. ISED Regulatory Compliance This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions: (1 )This device may not cause interference.(2)This device must accept any interference, including interference that may cause undesired operation of the device. Lmetteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR dInnovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes :(1)Lappareil ne doit pas produire de brouillage; (2)Lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. This equipment complies with IC RSS102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. Cet quipement est conforme aux limites d'exposition aux radiations IC CNR102 tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec une distance minimale de 20cm entre le radiateur et votre corps. Please notice that if the IC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains IC: 23460- WFM38BUWG1 any similar wording that expresses the same meaning may be used. Ltiquette dhomologation dun module dInnovation, Sciences et Dveloppement conomique Canada devra tre pose sur le produit hte un endroit bien en vue, en tout temps. En labsence dtiquette, le produit hte doit porter une tiquette sur laquelle figure le numro dhomologation du module dInnovation, Sciences et Dveloppement conomique Canada, prcd du mot contient , ou dune formulation similaire allant dans le mme sens et qui va comme suit : Contient IC: 23460-

WFM38BUWG1 est le numro dhomologation du module. i. ii. the device for operation in the band 51505250 MHz is only for indoor use to reduce the potential for harmful interference to co-channel mobile satellite systems;

for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the bands 5250-5350 MHz and 5470-5725 MHz shall be such that the equipment still complies with the e.i.r.p. limit;

iii. for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the band 5725-5850 MHz shall be such that the equipment still complies with the e.i.r.p. limits as appropriate; and i. le dispositif utilis dans la bande 5150-5250 MHz est rserv une utilisation en intrieur afin de rduire le risque de brouillage prjudiciable aux systmes mobiles par satellite dans le mme canal;

ii. pour les dispositifs antenne (s) dtachable (s), le gain d'antenne maximal autoris pour les dispositifs dans les bandes 5250-5350 MHz et 5470-5725 MHz doit tre tel que l'quipement soit toujours conforme la norme e.i.r.p. limite;

iii. pour les dispositifs antenne (s) dtachable (s), le gain d'antenne maximal autoris pour les dispositifs de la bande 5725-5850 MHz doit tre tel que l'quipement soit toujours conforme la norme e.i.r.p. les limites, le cas chant; et Sichuan AI-Link Technology Co.,Ltd. page 17 of 17

2022 08 11 10 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WiFi Module Integrated Bluetooth 2.1+EDR/4.2/5.0 Features Reserving System IEEE Std. 802.11a IEEE Std. 802.11b IEEE Std. 802.11g IEEE Std. 802.11n Bluetooth 2.1+EDR/4.2/5.0 Chip Solution Mediatek MT7638BUN Size 40.0mmx 35mm x 3.2mm Model Overview WF-M38B-

UWG1(FCC/IC) IEEE 802.11a/b/g/n 300Mbps 2.4G/5G Bluetooth2.1+EDR/4.2/5.0 3Mbps 2.4G

+IPEX 5V Sichuan AI-Link Technology Co.,Ltd. Add:

Anzhou,Industrial park,Mianyang,Sichuan

: +86-13881190925

http://www.ailinkiot.com WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 Feedback of customers Confirmation We accept the specification after Confirmed Customer name Customer signature Confirmation Date Please feed back this paper and first paper after your signature by the address,thanks!

ADD Anzhou,Industrial park,Mianyang,Sichuan Factory Sichuan AI-Link Technology Co.,Ltd. Approved Checked Product Designed WiFi Module Model Date WF-M38B-UWG1(FCC/IC) 2022-08-11 Sichuan AI-Link Technology Co.,Ltd. page 2 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 Record of Modification No Date of modification Main content of modification Reason of modification Serial number of modification 1 2022/8/11 Confirm Sichuan AI-Link Technology Co.,Ltd. page 3 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 1. Introduction WF-M38B-UWG1(FCC/IC) module design is based on Mediatek MT7638BUN solution, The MT7638BUN is a highly integrated single chip which has built in a 2x2 dual-band wireless LAN radio and Bluetooth radio. It includes Bluetooth EDR and LE radio which complies with Bluetooth v2.1+EDR, v4.2, and v5.0. The Module is a highly integrated MAC/BBP and 2.4/5GHz PA/LNA single chip which supports a 300Mbps PHY rate. The Module is designed to support standard-based features in the areas of security, quality of service, and international regulations, giving end users the greatest performance anytime and in any circumstance. This documentation describes the engineering requirements specification. 1.1 RF module Overview The general HW architecture for the module is shown in Figure 1. This WLAN Module design is based on Mediatek MT7638BUN. It is a highly integrated single-chip MIMO(Multiple In Multiple Out) Wireless LAN (WLAN) network interface controller complying with the 802.11 specification and Bluetooth over USB interface. It combines a MAC, a 2T2R capable baseband, and RF in a single chip. An intelligent Wi-

Fi/Bluetooth coexistence algorithm is implemented to provide the best harmonized Wi-Fi and Bluetooth radio performance. 5V 1.5V Internal DC/DC 2.4G TX0/RX0 1.2V 5G TX0/RX0 Internal LDO WF_ RFIO Dixplexer Antenna0 USB2.0 Interface MT7638BU N 2.4G TX1/RX1 5G TX1/RX1 WF_ RFIO Dixplexer Antenna1 2.4G TX2/RX2 Filter Filter BT_ RFIO 40MHz Antenna2 Figure 1 WF-M38B-UWG1(FCC/IC) Block Diagram Sichuan AI-Link Technology Co.,Ltd. page 4 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 1.2 Specification reference This specification is based on additional references listed below. _ IEEE Std. 802.11a _ IEEE Std. 802.11b _ IEEE Std. 802.11g _ IEEE Std. 802.11n _ Bluetooth 2.1+EDR/4.2/5.0 1.3 System Functions Table1: General Specification as below:

Main Chipset Operating Frequency WiFi Standard Bluetooth Modulation Data rates Form factor Host Interface PCB Stack Dimension Antenna Operation Temperature Storage Temperature Operation Voltage Mediatek MT7638BUN 2.4G/5G 802.11a/b/g/n (2x2) 2.1+EDR/4.2/5.0 WIFI:11b: DBPSK, DQPSK and CCK and DSSS 11a/g: BPSK, QPSK, 16QAM, 64QAM and OFDM 11n: BPSK, QPSK, 16QAM, 64QAM and OFDM BT: FHSS,GFSK,DPSK,DQPSK 11b: 1, 2, 5.5 and 11Mbps 11a/g: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps 11n: MCS0~15, up to 300Mbps 9pins , USB 2.0 4-layers design Typical 40.0mmx 35mm x 3.2mm WIFI Internal/BT external Antennas Design 0 to +70

-15 to +45 5V +/-10%

Sichuan AI-Link Technology Co.,Ltd. page 5 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 2. Mechanical Specification 2.1 Mechanical Outline Drawing Typical Dimension (W x L ): 40.0mmx 35mm x 3.2mm General tolerance: 0. 3mm 2.2 Product Picture TOP VIEW BOTTOM VIEW PCB :

BOT PCB Sichuan AI-Link Technology Co.,Ltd. page 6 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 2.3 Pin define Pin 1 RST Reset 2 3 4 5 6 7 8 9 WIFI_WAKE GND DP DM GND BT_WAKE

+5V

+5V WIFI Wake up Ground connections USB positive differential data lines USB negative differential data lines Ground connections BT Wake up Power supply 5.0V is required Power supply 5.0V is required Sichuan AI-Link Technology Co.,Ltd. page 7 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3. Electrical Specification This Specification is based-on conductive DVT testing result. The extreme condition include overall temperature (0,+25,+40) and overall voltage (3.0V,3.3V,3.6V). 3. 1 IEEE 802.11g/a Section:

Items Specification Mode Channel Data rate TX Characteristics 1. Power Levels 1) 15dBm Target (For Each antenna port)

@ 11g/6Mbps~54Mbps 2) 14dBm Target (For Each antenna port)

@ 11a/6Mbps~54Mbps 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power 1) 6Mbps 2) 9Mbps 3) 12Mbps 4) 18Mbps 5) 24Mbps 6) 36Mbps 7) 48Mbps 8) 54Mbps 4. Frequency Error 1) IEEE802.11g 2) IEEE802.11a RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) 6Mbps (PER 10%) 2) 9Mbps (PER 10%) 3) 12Mbps (PER 10%) 4) 18Mbps (PER 10%) 5) 24Mbps (PER 10%) 6) 36Mbps (PER 10%) 7) 48Mbps (PER 10%) 8) 54Mbps (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11g 2) IEEE802.11a Contents IEEE802.11g & IEEE802.11a BPSK, QPSK, 16QAM, 64QAM and OFDM CH1 to CH11 @ 11g CH36,CH40,CH44,CH48 CH52,CH56,CH60,CH64,CH100,CH104,CH108,CH112, CH116,CH120,CH124,CH128,CH132,CH136,CH140 CH149,CH153.CH157,CH161,CH165@ 11a 6, 9, 12, 18, 24, 36, 48, 54Mbps Max. Min. Typ. Unit Remark 13 12 15 14

-25

-30 Min.

-20

-30

Typ.

17 16

-20

-28

-40

-5

-8

-10

-13

-16

-19

-22

-25 25 30 Max.

-82

-81

-79

-77

-74

-70

-66

-65

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 8 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.2 IEEE 802.11b Section:

Items Specification Mode Channel Data rate TX Characteristics Min. Contents IEEE802.11b DBPSK, DQPSK and CCK and DSSS CH1 to CH11 1, 2, 5.5, 11Mbps Max. Typ. Unit Remark 1. Power Levels(Calibrated) 1) 17dBm Target (For Each antenna port)

@1Mbps~11Mbps 2. Spectrum Mask @ Target Power 1) fc +/-11MHz to +/-22MHz 2) fc > +/-22MHz 3. Constellation Error(EVM) @ Target Power 1) 1Mbps 2) 2Mbps 3) 5.5Mbps 4) 11Mbps 4. Frequency Error RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) 1Mbps (FER 8%) 2) 2Mbps (FER 8%) 3) 5.5Mbps (FER 8%) 4) 11Mbps (FER 8%) 6. Maximum Input Level (FER 8%) 15 17 19 dBm

-25 Min.

-10

-20

Typ.

-83

-80

-79

-76

-30

-50

-10

-10

-10

-10 25 Max.

-76

-76

-76

-76

dBr dBr dB dB dB dB ppm Unit dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 9 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.3 IEEE 802.11n HT20 Section:

Items Specification Mode Channel Data rate (MCS index) TX Characteristics 1. Power Levels 1) 14dBm Target (For Each antenna port)

@ 2.4G/MCS0~MCS7 2) 13dBm Target (For Each antenna port)

@ 5G/MCS0~MCS7 2. Spectrum Mask @ Target Power 1) at fc +/-11MHz 2) at fc +/-20MHz 3) at fc > +/-30MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level (PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G Contents IEEE802.11n HT20 @ 2.4G IEEE802.11n HT20 @ 5G BPSK, QPSK, 16QAM, 64QAM and OFDM CH1to CH11 @ 2.4G CH36,CH40,CH44,CH48 CH52,CH56,CH60,CH64,CH100,CH104,CH108,CH112, CH116,CH120,CH124,CH128,CH132,CH136,CH140, CH149,CH153,CH157,CH161,CH165@ 5G MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 Max. Remark Typ. Min. Unit 12 11 14 13

16 15

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-25

-20 Min.

Typ. 25 20 Max.

-20

-30

-82

-79

-77

-74

-70

-66

-65

-64

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 10 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.4 IEEE 802.11n HT40 Section:

Items Specification Mode Channel Data rate (MCS index) TX Characteristics 1. Power Levels (Calibrated) 1) 14dBm Target (For Each antenna port)

@ 2.4G/MCS0~MCS7 2) 13dBm Target (For Each antenna port)

@ 5G/MCS0~MCS7 2. Spectrum Mask @ Target Power 1) at fc +/-21MHz 2) at fc +/-40MHz 3) at fc > +/-60MHz 3. Constellation Error(EVM) @ Target Power 1) MCS0 2) MCS1 3) MCS2 4) MCS3 5) MCS4 6) MCS5 7) MCS6 8) MCS7 4. Frequency Error 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G RX Characteristics 5. Minimum Input Level Sensitivity(each chain) 1) MCS0 (PER 10%) 2) MCS1 (PER 10%) 3) MCS2 (PER 10%) 4) MCS3 (PER 10%) 5) MCS4 (PER 10%) 6) MCS5 (PER 10%) 7) MCS6 (PER 10%) 8) MCS7 (PER 10%) 6. Maximum Input Level(PER 10%) 1) IEEE802.11n HT20 @ 2.4G 2) IEEE802.11n HT20 @ 5G Contents IEEE802.11n HT40 @ 2.4G IEEE802.11n HT40 @ 5G BPSK, QPSK, 16QAM, 64QAM and OFDM CH3to CH9 @ 2.4G CH38,CH46,CH54,CH62,CH102,CH110,CH118,CH126, CH134,CH151,CH159 @ 5G MCS0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15 Max. Typ. Min. Unit Remark 12 11 14 13

16 15

-20

-28

-45

-5

-10

-13

-16

-19

-22

-25

-28

-25

-20 Min.

Typ. 25 20 Max.

-20

-30

-79

-76

-74

-71

-67

-63

-62

-61

dBm dBm dBr dBr dBr dB dB dB dB dB dB dB dB ppm ppm Unit dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 11 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 3.6 Bluetooth Section:

Items Specification Mode Number of Channel Frequency Band 1. Output Power 2.Gain step 3. Receiver sensitivity (BER 0.1%) 4. Maximum usable signal (BER 0.1%) 5. C/I co-channel (BER<0.1%) 6. C/I 1MHz (BER<0.1%) 7. C/I 2MHz (BER<0.1%) 8. C/I3MHz (BER<0.1%) 9. C/I Image channel (BER<0.1%) 10. C/I Image 1MHz (BER<0.1%) 11. Inter-modulation 12. Out-of-band blocking 1). 30MHz to 2000MHz 2). 2000MHz to 2399MHz 3). 2498MHz to 3000MHz 4). 3000MHz to 12.75GHz 13. Modulation characteristics 1). f1avg 2). f2max (For at least 99.9% of all f2max) 3). f1avg /f2avg 14. ICFT 15. Carrier frequency drift 1). One slot packet (DH1) 2). Two slot packet (DH3) 3). Five slot packet (DH5) 4). Max drift rate 16. TX output spectrum(20dB bandwidth) 17. In-Band spurious emission 1). 2MHz offset 2). 3MHz offset 3). >3MHz offset Min. 4 2

-10

-27

-27

-10 140 115 0.8

-75

-25

-40

-40

Contents BT2.1+EDR/4.2/5.0 FHSS,GFSK,DPSK,DQPSK 79 Channels 2.402 GHz ~2.480GHz Unit dBm dB dBm Remark Typ. Max. 10 8

-80

11 0

-30

-40

-9

-20

7 4

-93.5

-5 4

-14

-42

-49

-25

-50

-13

157 140 0.98 20 15 15 15 6 922

-45

-48

-48

175

+75

+25

+40

+40 20 1000

-20

-40

-40 dB dB dB dB dB dB dB dBm dBm dBm dBm KHz KHz KHz KHz KHz KHz KHz KHz/50us KHz dBm dBm dBm Sichuan AI-Link Technology Co.,Ltd. page 12 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 4. Current consumption 4.1 WLAN current consumption Description Sleep moderadio off 2.4GHz RX power savingDTIM=1 2.4GHz RX activeHT20MCS15 2.4GHz TX CCK11Mbps@21dBm 2.4GHz TX HT20MCS15 @17.5dBm 2.4GHz TX HT20MCS8 @18dBm 5GHz VHT80 RX listen2RX 5GHz RX activeHT40MCS15 5GHz TX HT40MCS15 @ 15.5dBm 5GHz TX HT40MCS0@ 16.5dBm,2TX 4.2 Bluetooth current consumption Description Sleep moderadio off Bluetooth TX@9dBm Bluetooth RX Bluetooth SCO connectionHV3 packets + sniff mode

+ scanpage scan interval=1.28secinquiry scan interval=2.56ssniff interval=500ms Bluetooth page scan + inquiry scanpage scan interval=1.28secinquiry scan interval=2.56s Bluetooth page scanpage scan interval=1.28sec Note Average currentmA 1.5 3.3 144 403 496 520 152 191 698 723 Average currentmA 1.5 42 21 21 1.7 1.6 1 All result is measured provided VDD33 is 3.3V. Tx power is measured at antenna port. Temperature is 25. 2 Host interface is USB2.0 3 Duty cycle for TX/RX measurement is 100%

4 The chip variation is +/-15%

Sichuan AI-Link Technology Co.,Ltd. page 13 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 5. Software Requirements The driver supports the following operating systems: Linux, Microsoft Windows XP, Vista and Win7. Mfg. software tool is MT7638BUN_QA_Tool. 6. Key component List

1 2 MT7638BUN QFN PCB JUI7.820.0786 FR-4,4LAY 3 SMD3225-40M 40M 4 TX-DM 5 5V-3.3V 7. Antenna specification MTK Hosonic TXC NO. Type Antenna Project Code Gain Part No. 1 External PIFA Antenna 2.32 dBi(@2.4 ~ 2.5 GHz) 4.13 dBi(@5.15 ~ 5.85 GHz) TX-DM50@1000BD113B63M 2 External PIFA Antenna 1.72 dBi(@2.4 ~ 2.5 GHz) 2.57 dBi(@5.15 ~ 5.85 GHz) SLK-T3010-L-XI-B Sichuan AI-Link Technology Co.,Ltd. page 14 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 8. Packaging Information:

15 180 a) b) 22g c) 20300/;

d) 240mm*385mm*140mm;

e)

Sichuan AI-Link Technology Co.,Ltd. page 15 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 9. FCC Statement FCC regulatory compliance statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Warning: changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This Module complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Labelling Instruction for Host Product Integrator Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains FCC ID: 2AOKI- WFM38BUWG1 any similar wording that expresses the same meaning may be used. Installation Notice to Host Product Manufacturer The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or install module. The module is limited to installation in mobile application, a separate approval is required for all other operating configurations, including portable configurations with respect to 2.1093 and difference antenna configurations. Antenna Change Notice to Host manufacturer If you desire to increase antenna gain and either change antenna type or use same antenna type certified, a Class II permissive change application is required to be filed by us, or you (host manufacturer) can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application. FCC other Parts, Part 15B Compliance Requirements for Host product manufacturer This modular transmitter is only FCC authorized for the specific rule parts listed on our grant, host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. Host manufacturer in any case shall ensure host product which is installed and operating with the module is in compliant with Part 15B requirements. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Sichuan AI-Link Technology Co.,Ltd. page 16 of 17 WF-M38B-UWG1(FCC/IC) IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0 10. ISED Regulatory Compliance This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions: (1 )This device may not cause interference.(2)This device must accept any interference, including interference that may cause undesired operation of the device. Lmetteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR dInnovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes :(1)Lappareil ne doit pas produire de brouillage; (2)Lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. This equipment complies with IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. Cet quipement est conforme aux limites d'exposition aux radiations IC CNR-102 tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec une distance minimale de 20cm entre le radiateur et votre corps. Please notice that if the IC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains IC: 23460- WFM38BUWG1 any similar wording that expresses the same meaning may be used. Ltiquette dhomologation dun module dInnovation, Sciences et Dveloppement conomique Canada devra tre pose sur le produit hte un endroit bien en vue, en tout temps. En labsence dtiquette, le produit hte doit porter une tiquette sur laquelle figure le numro dhomologation du module dInnovation, Sciences et Dveloppement conomique Canada, prcd du mot contient , ou dune formulation similaire allant dans le mme sens et qui va comme suit : Contient IC: 23460- WFM38BUWG1 est le numro dhomologation du module. i. ii. the device for operation in the band 51505250 MHz is only for indoor use to reduce the potential for harmful interference to co-channel mobile satellite systems;

for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the bands 5250-5350 MHz and 5470-5725 MHz shall be such that the equipment still complies with the e.i.r.p. limit;

iii. for devices with detachable antenna(s), the maximum antenna gain permitted for devices in the band 5725-5850 MHz shall be such that the equipment still complies with the e.i.r.p. limits as appropriate; and i. le dispositif utilis dans la bande 5150-5250 MHz est rserv une utilisation en intrieur afin de rduire le risque de brouillage prjudiciable aux systmes mobiles par satellite dans le mme canal;

ii. pour les dispositifs antenne (s) dtachable (s), le gain d'antenne maximal autoris pour les dispositifs dans les bandes 5250-5350 MHz et 5470-5725 MHz doit tre tel que l'quipement soit toujours conforme la norme e.i.r.p. limite;

iii. pour les dispositifs antenne (s) dtachable (s), le gain d'antenne maximal autoris pour les dispositifs de la bande 5725-5850 MHz doit tre tel que l'quipement soit toujours conforme la norme e.i.r.p. les limites, le cas chant; et Sichuan AI-Link Technology Co.,Ltd. page 17 of 17

WF-M38B-UWG1 FCC ID: 2AOKI-WFM38BUWG1 IC: 23460-WFM38BUWG1 VY) SAI 4 BR ZS]

Sichuan AI-Link Technology Co. , Ltd. WE-M38B-UWG1 (FCC/IC) FCC ID: 2A0KI-WFM3SBUWG1 IC: 23460-WFM3SBUWGL PU) SEIS IBE OSE BRAS Sichuan AI-Link Technology Co. , Ltd.

Sichuan AI-Link Technology Co.,Ltd. Authority to Act as Agent Date: September 7, 2022 American Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern:

_____Intertek Testing Services Shanghai 1 __ is authorized to act on our behalf, until otherwise notified, for applications to American Certification Body, Inc. (ACB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. We also declare that the information provided to the FCC is true and correct to the best of our knowledge (47 CFR 2.911(d)) and we have been informed of the grantee responsibilities (47 CFR 2.909) with regard to certified equipment. Thank you, Agency Agreement Expiration Date: _____2023/09/05_____ By:

(Signature2) ______HU CAIXIA ___________

(Print name) Title:

_______ Manager_____________ On behalf of: _____Sichuan AI-Link Technology Co.,Ltd.__________

(Company Name) Telephone:

__ +15881437297 __________ 1 - If a group entity is designated as the authorized agent, the letter of authorization must identify those individuals within the group who are authorized to take action on the application; or alternatively a statement must be provided indicating that as the authorized agent, any individual within the group entity is authorized to act on behalf of the applicant /

grantee and take action on the application. See https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=33316 . 2 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Sichuan AI-Link Technology Co.,Ltd. Request for Confidentiality Date: September 7, 2022 Subject: Confidentiality Request for: _FCC ID: 2AOKI-WFM38BUWG1 Pursuant to FCC 47 CFR 0.457(d) and 0.459 and IC RSP-100, Section 9.4, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Permanent Permanent *1 Permanent Permanent Permanent Permanent Permanent *3 Exhibit Block Diagrams External Photos Internal Photos Operation Description/Theory of Operation Parts List & Placement/BOM Tune-Up Procedure Schematics Test Setup Photos Users Manual ______Sichuan AI-Link Technology Co.,Ltd._____ has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality:

The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality:

The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of ___(specify number of days not to exceed 180)2___ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify ACB in the event information regarding the product or the product is made available to the public before the requested period has expired. ACB will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. NOTE for Industry Canada Applications:

IC currently only distinguishes Permanent Confidentiality exhibits as shown above. Short Term confidentiality is not considered applicable to IC applications. Sincerely, By:

(Signature/Title3) ___ ___HU CAIXIA___________

(Print name) 1 - The asterisked items (*) require further information to be provided to ACB before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 and the specific Document link for D01 found at:

https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. 2 - Please refer to http://acbcert.com/documents/misc-docs/Memo-Short-Term-Vs-Standard-Confidentiality.pdf for complete details. 3 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Sichuan AI-Link Technology Co.,Ltd. Request for Modular/Limited Modular Approval Date: September 7, 2022 Subject: Manufacturers Declaration for - Modular Approval

- Split Modular Approval

- Limited Modular Approval - Limited Split Modular Approval Confidentiality Request for: FCC ID: 2AOKI-WFM38BUWG1 8 Basic Requirements FCC Part 15.212(a)(1) For Items Marked NO(*), the Limited Module Description Must be Filled Out on the Following Pages Modular Approval Requirement Requirement Met 1. The modular transmitter must have its own RF shielding. This is intended to ensure that the module does not have to rely upon the shielding provided by the device into which it is installed in order for all modular transmitter emissions to comply with FCC limits. It is also intended to prevent coupling between the RF circuitry of the module and any wires or circuits in the device into which the module is installed. Such coupling may result in non-compliant operation. The physical crystal and tuning capacitors may be located external to the shielded radio elements. 15.212(a)(1)(i)

- YES - NO(*) Details: The module contains a metal shield which covers all RF components and circuitry. The shield is located on the top of the board next to antenna connector. 2. The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with FCC requirements under conditions of excessive data rates or over-modulation. 15.212(a)(1)(ii)

- YES - NO(*) Details: Data to the modulation circuit is buffered as described in the operational description provided with the application. 3. The modular transmitter must have its own power supply regulation on the module. This is intended to ensure that the module will comply with FCC requirements regardless of the design of the power supplying circuitry in the device into which the module is installed. 15.212(a)(1)(iii)

- YES - NO(*) Details: The module contains its own power supply regulation. Please refer to schematic filed with this application. 4. The modular transmitter must comply with the antenna and transmission system requirements of 15.203, 15.204(b), 15.204(c), 15.212(a), and 2.929(b). The antenna must either be permanently attached or employ a unique antenna coupler (at all connections between the module and the antenna, including the cable). The professional installation provision of 15.203 is not applicable to modules but can apply to limited modular approvals under paragraph 15.212(b). 15.212(a)(1)(iv)

- YES - NO(*) Details: The module connects to one permanently attached antennaPCB antennas on board and one unique antenna connector. 5. The modular transmitter must be tested in a stand-alone configuration, i.e., the module must not be inside another device during testing. This is intended to demonstrate that the module is capable of complying with Part 15 emission limits regardless of the device into which it is eventually installed. Unless the transmitter module will be battery powered, it must comply with the AC line conducted requirements found in Section 15.207. AC or DC power lines and data input/output lines connected to the module must not contain ferrites, unless they will be marketed with the module (see Section 15.27(a)). The length of these lines shall be length typical of actual use or, if that length is unknown, at least 10 centimeters to insure that there is no coupling between the case of the module and supporting equipment. Any accessories, peripherals, or support equipment connected to the module during testing shall be unmodified or commercially available (see Section 15.31(i)). 15.212(a)(1)(v)

- YES - NO(*) Details: The module was tested stand-alone as shown in test setup photographs filed with this application. 070920-02b Sichuan AI-Link Technology Co.,Ltd. Modular Approval Requirement 6. The modular transmitter must be labeled with its own FCC ID number, or use an electron display (see Requirement Met KDB Publication 784748). If using a permanently affixed label with its own FCC ID number, if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains Transmitter Module FCC ID: XYZMODEL1 or Contains FCC ID:

XYZMODEL1. Any similar wording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. In the latter case, a copy of these instructions must be included in the application for equipment authorization. If the modular transmitter uses an electronic display of the FCC identification number, the information must be readily accessible and visible on the modular transmitter or on the device in which it is installed. If the module is installed inside another device, then the outside of the device into which the module is installed must display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains FCC certified transmitter module(s). Any similar wording that expresses the same meaning may be used. The user manual must include instructions on how to access the electronic display. A copy of these instructions must be included in the application for equipment authorization. 15.212(a)(1)(vi)

- YES - NO(*) Details: There is a label on the module as shown in the labeling exhibit filed with this application. Host specific labeling instructions are shown in the installation manual .filed with this application. 7. The modular transmitter must comply with all specific rule or operating requirements applicable to the transmitter, including all the conditions provided in the integration instructions by the grantee. A copy of these instructions must be included in the application for equipment authorization. For example, there are very strict operational and timing requirements that must be met before a transmitter is authorized for operation under Section 15.231. For instance, data transmission is prohibited, except for operation under Section 15.231(e), in which case there are separate field strength level and timing requirements. Compliance with these requirements must be assured. 15.212(a)(1)(vii)

- YES - NO(*) Details: The module complies with FCC Part 15C requirements. Instructions to the OEM installer are provided in the installation manual filed with this application. 8. The modular transmitter must comply with any applicable RF exposure requirements. For example, FCC Rules in Sections 2.1091, 2.1093 and specific Sections of Part 15, including 15.319(i), 15.407(f), 15.253(f) and 15.255(g), require that Unlicensed PCS, UNII and millimeter wave devices perform routine environmental evaluation for RF Exposure to demonstrate compliance. In addition, spread spectrum transmitters operating under Section 15.247 are required to address RF Exposure compliance in accordance with Section 15.247(b)(4). Modular transmitters approved under other Sections of Part 15, when necessary, may also need to address certain RF Exposure concerns, typically by providing specific installation and operating instructions for users, installers and other interested parties to ensure compliance. 15.212(a)(1)(viii)

- YES - NO(*) Details: The module meets mobile device exclusion levels as shown in the RF exposure information filed with this application. 070920-02b Sichuan AI-Link Technology Co.,Ltd. Limited Module Description When Applicable

* If a module does NOT meet one or more of the above 8 requirements, the applicant may request Limited Modular Approval (LMA). This Limited Modular Approval (LMA) is applied with the understanding that the applicant will demonstrate and will retain control over the final installation of the device, such that compliance of the end product is always assured. The operating condition(s) for the LMA;

the module is only approved for use when installed in devices produced by grantee. A description regarding how control of the end product, into which the module will be installed, will be maintained by the applicant/manufacturer, such that full compliance of the end product is always ensured should be provided here. Details: <example - N/A>

Software Considerations KDB 594280 / KDB 442812 (One of the following 2 items must be applied) Requirement 1. For non-Software Defined Radio transmitter modules where software is used to ensure compliance of the device, technical description must be provided about how such control is implemented to ensure prevention of third-party modification; see KDB Publication 594280. Requirement Met

- Provided in Separate Cover Letter

- N/A Details: The firmware of the device can not be modified or adjusted by the end user as described in described in operation description. 2. For Software Defined Radio (SDR) devices, transmitter module applications must provide a software security description; see KDB Publication 442812.

- Provided in Separate Cover Letter

- N/A Details: <example N/A>

Split Modular Requirements Requirement Provided in Manual 1. For split modular transmitters, specific descriptions for secure communications between front-end and control sections, including authentication and restrictions on third-party modifications; also, instructions to third-party integrators on how control is maintained.

- Provided in Separate Cover Letter

- N/A Details: <example N/A >

070920-02b Sichuan AI-Link Technology Co.,Ltd. OEM Integration Manual Guidance KDB 996369 D03 Section 2 Clear and Specific Instructions Describing the Conditions, Limitations, and Procedures for third-parties to use and/or integrate the module into a host device. Requirement Is this module intended for sale to third parties?

- YES

- No, If No, and LMA applies, the applicant can optionally choose to not make the following detailed info public. However there still needs to be basic integration instructions for a users manual and the information below must still be included in the operational description. If the applicant wishes to keep this info confidential, this will require a separate statement cover letter explaining the module is not for sale to third parties and that integration instructions are internal confidential documents. Items required to be in the manual See KDB 996369 D03, Section 2 As of May 1, 2019, the FCC requires ALL the following information to be in the installation manual. Modular transmitter applicants should include information in their instructions for all these items indicating clearly when they are not applicable. For example information on trace antenna design could indicate Not Applicable. Also if a module is limited to only a grantees own products and not intended for sale to third parties, the user instructions may not need to be detailed and the following items can be placed in the operational description, but this should include a cover letter as cited above. 1. List of applicable FCC rules. KDB 996369 D03, Section 2.2 a. Only list rules related to the transmitter. 2. Summarize the specific operational use conditions. KDB 996369 D03, Section 2.3 a. Conditions such as limits on antennas, cable loss, reduction of power for point to point 3. Limited Module Procedures. KDB 996369 D03, Section 2.4 systems, professional installation info a. Describe alternative means that the grantee uses to verify the host meets the necessary limiting conditions b. When RF exposure evaluation is necessary, state how control will be maintained such that compliance is ensured, such as Class II for new hosts, etc. 4. Trace antenna designs. KDB 996369 D03, Section 2.5 a. Layout of trace design, parts list, antenna, connectors, isolation requirements, tests for design verification, and production test procedures for ensuring compliance. If confidential, the method used to keep confidential must be identified and information provided in the operational description. 5. RF exposure considerations. KDB 996369 D03, Section 2.6 a. Clearly and explicitly state conditions that allow host manufacturers to use the module. Two types of instructions are necessary: first to the host manufacturer to define conditions (mobile, portable xx cm from body) and second additional text needed to be provided to the end user in the host product manuals. 6. Antennas. KDB 996369 D03, Section 2.7 a. List of antennas included in the application and all applicable professional installer instructions when applicable. The antenna list shall also identify the antenna types

(monopole, PIFA, dipole, etc note that omni-directional is not considered a type) 7. Label and compliance information. KDB 996369 D03, Section 2.8 a. Advice to host integrators that they need to provide a physical or e-label stating Contains FCC ID: with their finished product 8. Information on test modes and additional testing requirements. KDB 996369 D03, Section 2.9 a. Test modes that should be taken into consideration by host integrators including clarifications necessary for stand-alone and simultaneous configurations. b. Provide information on how to configure test modes for evaluation 9. Additional testing, Part 15 Subpart B disclaimer. KDB 996369 D03, Section 2.10 Sincerely,

- All Items shown to the left are provided in the Modular Integration Guide (or UM) for Full Modular Approval (MA) or LMA.

- An LMA applies and is approved ONLY for use by the grantee in their own products, and not intended for sale to 3rd parties as provided in a separate cover letter. Therefore the information shown to the left is found in the theory of operation. By: _______________________ _________HU CAIXIA____________

(Signature/Title1)

(Print name) 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead. 070920-02b

DECLARATION We, Sichuan AI-Link Technology Co., Ltd. declare Our companys project WIFI BT Module Model: WF-M38B-UWG1, WF-M38B-UWG1(FCC/IC) are same, Except different label type. The above-mentioned statements of our company are totally true. If false, we will bear corresponding liability. WF-M38B-UWG1 WF-M38B-UWG1(FCC/IC) Date: September 05, 2022

HU CAIXIA Sichuan AI-Link Technology Co., Ltd. Tel: +15881437297 Email: caixia.hu@changhong.com

Sichuan AI-Link Technology Co.,Ltd. Declaration Letter We Sichuan AI-Link Technology Co.,Ltd. hereby declare that the product WIFI BT Module/WF-M38B-UWG1,WF-M38B-UWG1(FCC/IC) is capable of operating with channel 12 and 13 in regions other than the US and Canada. Versions of the product available for import and sale in the US and Canada, or any units marked with the FCC ID or IC certification number, will not operation on channels 12 and 13. It will not be possible for users and configure these channels in the US and Canada version. Installation of this product must comply with local regulations and codes. During deployment of the system and its initial setup, professional installer must ensure that the allowed EIRP limit is not exceeded (in the Country of exploitation of this equipment). Date: September 05, 2022

HU CAIXIA Sichuan AI-Link Technology Co., Ltd. Tel: +15881437297 Email: caixia.hu@changhong.com

Sichuan AI-Link Technology Co.,Ltd. FCC ID: 2AOKI-WFM38BUWG1 IC: 23460- WFM38BUWG1 SDR or Non-SDR device Cover Letter 1. Can the RF parameters of the device be altered through software?

Yes. 2. Can third parties not permitted by the Commission through specific filings modify, configure, or load different software, or make configuration settings to operate the device or host hardware radio frequency parameters (frequency range, modulation type, maximum output power or other radio parameters) in any other way than granted (or expected to be granted)?

No. 3. Is the device capable of operating in any other in any other way than granted, or will be, granted?

No. 4. Is this a Part 15 client device as defined in Section 15.202 (as opposed to a master device)?

5. Does the manufacturer elect SDR?

No, not an SDR. According to the conclusion of the question, the product is not SDR. Thank you. Sincerely, Caixia Hu / Director Sichuan AI-Link Technology Co., Ltd. Tel: +15881437297 Email: caixia.hu@changhong.cm