FCC ID: 2AWBQ-EW21SF 5GHz Wireless Module

EverestekInc. 5GHz 2.1CH Module (SW-S) Everestek Data Sheet Everestek Inc. Version: 1.4

. 2020/01/07 www.everestek.biz Page 1 EverestekInc. 1. Features The SW-S is a module based on Everestek ETK52, providing 3 channels audio for 2.1 channel (L+R+subwoofer) application. Operating in both 5.2G and 5.8GHz RF bands. This module support 3 channels compressed audio stream and comes with additional features such as data encryption, pairing functionality, bi-directional data messages, enhanced RF interference detection, and automatic frequency allocation. Brief features include:

Radio Frequency: 5.8G and 5.2G unlicensed bands Delay Time Variation + audio jitter is only +/- 6.5sec.

(Total delay time variation is less than +/-2.5 degree @ 1K sine tone.) Digital I2S (master or slave) Audio Interface, 24bit , 32/44.1/48KHz Sampling Rate Long Link Distance Advanced RF Selection Algorithm Small RF Foot Print Best Coexistence with Wi-Fi/Bluetooth Highly Integrated SoC: RF/PA/CPU/Flash Embedded Wide-Band Antenna on Module Short RBOM List RF Modulation: FSK Low Power Consumption Supply Voltage: 2.7~3.6V Support I2C master/slave mode and UART Compliant with EMC Regulations (FCC/CE) 2. Application Wireless 2.1 channels audio Dolby ATMOS 5.1.2 / 5.1.4 Dolby Digital 5.1 www.everestek.biz Page 3 EverestekInc. 3. Electrical Specifications Item RF Carrier Frequency

-20dB bandwidth Output Power RF Sensitivity Operation Condition Min 5725 5135 Digital interface Item VDD Item VIH VIL VOH VOL RF Specification Typ 2 7

-85 Max 5845 5255 Unit Note MHz For 5.8GHz MHz For 5.2GHz MHz dBm dBm Min 2.7 Typ 3.3 Max 3.6 Unit Note V Power Supply Voltage Min Typ Max Unit Note VSS 0.7VDD VDD-0.3 0 VDD+0.2 0.3VDD VDD 0.3 V V V V Input High Threshold Input Low Threshold Output High Threshold Output Low Threshold www.everestek.biz Page 4 EverestekInc. 4. Mechanical Specification Different labels and part numbers are used to distinguish between Tx and Rx. Dimension34 mm x 18 mm, thickness 2.5mm (PCB with shielding case, connector is not included) PCB 4 Layers Mechanical Drawing:

Bottom view Notrace,ground,powercopperunderneaththisarea!

AntennaArea 1 3 2(use plastic screw only) 9 18 25 16.5 1.27 3 4 1.27 1 2 25 26 9

(0,0) www.everestek.biz Page 5 EverestekInc. Connector Drawing:

4 7

. C 2.1 Channel I2S pins connections Note: Subwoofer I2S output, L-channel data will be the original data from Tx, R-channel will be the inverse data of L-channel FCC Federal Communication Commission Interference Statement 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 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. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate this equipment. 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. This device is restricted for indoor use. FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. www.everestek.biz Page 6 EverestekInc. IMPORTANT NOTE:

This module is intended for OEM integrator. This module is only FCC authorized for the specific rule parts listed on the grant, and that the 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. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. Additional testing and certification may be necessary when multiple modules are used. USERS MANUAL OF THE END PRODUCT:

In the users manual of the end product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated. The end user has to be informed that the FCC radio-frequency exposure guidelines for an uncontrolled environment can be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. This device complies with Part 15 of 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. LABEL OF THE END PRODUCT:

The final end product must be labeled in a visible area with the following " Contains TX FCC ID: 2AWBQ-

EW21SF ". This device complies with Part 15 of 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. ANT LIST Ant. 1 2 Brand Model Name Antenna Type Connector Gain (dBi) Remark N/A N/A N/A N/A Printed Antenna Printed Antenna N/A N/A 2 2 TX RX www.everestek.biz Page 7

Model Name: EW21SF -TX FCC ID:2AWBQ-EW21SF Brand Name: Everestek S/N: WWYY2R3FRXXXXX FW Ver:XXX [acm]

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Everestek Inc. 2F.-1, No. 5, Tai-Yuen 1st St., Zhubei City, Hsinchu County, 30288 Taiwan Confidential Letter Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Request for Confidentiality FCC ID : 2AWBQ-EW21SF To Whom It May Concern:

Long Term Confidentiality Pursuant to Sections 0.457 and 0.459 of the Commission's Rules, we hereby respectfully request confidential treatment of information accompanying this application as outlined below:

e Block Diagrams e@ Schematics e Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We understand that pursuant to Rule 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application. Short Term Confidentiali Pursuant to Sections 0.457 and 0.459 of the Commission's Rules, we hereby respectfully request short-term confidential treatment of information accompanying this application as outlined below until 180 days after the Grant Date of Equipment Authorization in order to ensure sensitive business information remains confidential until the actual marketing of the device:

e External Photos e Internal Photos e Test Setup photos e@ Users Manuals Date: 2020/5/7 Sincerely, Applicant's company name : Everestek Inc. Applicant's company address : 2F.-1,No. 5, Tai-Yuen Ist St., Zhubei City, Hsinchu County, 30288 Taiwan Signature :

AvobunJ A Name and Job Title : Andrew Chen / Vice President E-Mail : andrew.chen@everestek.biz Tel 1 +886-3-5601799 ext. 615 Fax 1 +886-3-5601599

Module Approval Request Letter Date: 2020/7/1 Subject: Module Approval FCC ID: 2AWBQ-EW21SF To Whom It May Concern:

explained below. External Photo. We, Sporton International Inc., are authorized by Everestek Inc. to have their state-of-the-art device approved under module approval authorization. The application of this module is specified to mobile host equipment. The requirements regulated in CFR47 Part 15.212 have been fulfilled and clearly 1. The requirement of RF shielding: The shielding of the radio portion can be demonstrated in exhibition 2. 3. 4. The requirement of buffered inputs: Buffered data inputs stage has been integrated in ETK52 chip. The requirement of power supply regulation: The part number of the power regulator is in ETK52 chip. The requirements of section 15.203 and 15.204(C): The requirements of antenna connector and spurious emission have been fulfilled. Please reference the exhibition Test Report. 5. The requirement of stand-alone test configuration: Please reference exhibition Test Configuration Photo for the stand-alone test configuration. 6. The requirement of labeling: The instruction on the labeling rule of the end product has been stated in the users manual of this module. Please also see the exhibition Label Sample. 7. The requirement of compliance on specific rule or operating requirements: The required FCC rule has been fulfilled and all the instructions for maintaining compliance has been clearly stated in the Users 8. The requirement of RF exposure: Please refer exhibition RF Exposure for the compliance of MPE RF Manual. exposure rule. Please do not hesitate to contact me for any questions of this request letter. Thank you. Company name

: Sporton International Inc. Company Address

: No.8, Lane 724, Bo-ai St., Jhubei City, Hsinchu County 302, Taiwan, R.O.C. Signature Name Job Title

: Leo Huang

: Manager Page No.

: 40

Everestek Inc. 2F.-1, No. 5, Tai-Yuen 1st St., Zhubei City, Hsinchu County, 30288 Taiwan Power of Attorney Date: 2020/5/7 Dear Sir,

| hereby have entrusted the following person to be a proxy regarding application for Type Certification. Sporton International Inc. Address : No.8, Lane 724, Bo-ai St., Jnubei City, HsinChu County 302, Taiwan, R.O.C. Name : Leo Huang Job Title =: Manager e-mail : Leohuang@sporton.com.tw lam therefore responsible for the contents of the application. FCC ID: 2AWBQ-EW21SF Sincerely, Applicant's company name : Everestek Inc. Applicant's company address : 2F.-1, No, 5, Tai-Yuen Ist St., Zhubei City, Hsinchu County, 30288 Taiwan be Du ye Name and Job Title : Andrew Chen / Vice President E-Mail : andrew.chen@everestek.biz Tel > +886-3-5601799 ext. 615 Fax > +886-3-5601599

Everestek Inc. 2F.-1, No. 5, Tai-Yuen 1st St., Zhubei City, Hsinchu County, 30288 Taiwan SDoC Attestation Letter Date: 2020/5/7 We Everestek Inc., as the grantee of this project (FCC ID: 2AWBQ-EW21SF / Brand Name:

Everestek / Model No.: EW21SF), would like to declare that the composite portion has been authorized under the Supplier's Declaration of Conformity procedures (Sporton report No.:

FD041026, FCC designation number: TW1096). The final product shall consequently comply with the FCC rule applied for SDoC Procedure. Regards, Sincerely, Applicant's company name : Everestek Inc, Applicant's company address : 2F.-1, No. 5, Tai-Yuen Ist St., Zhubei City, Hsinchu County, 30288 Taiwan Signature ; L pee PEP po Name and Job Title : Andrew Chen / Vice President E-Mail : andrew.chen@everestek.biz Tel : +886-3-5601799 ext. 615 Fax 1 +886-3-5601599