FCC ID: 2BAGJ-EESWBU05 Wi-Fi Stick

Wi-Fi Stick User Manual EESW-BU05 V220117R http://www.e-linter.com PQUM-0007-V220117R Wi-Fi Stick User Manual EESW-BU05 Revision History/

Revision History/

Date/

Editor/

Version/

Description/

2022/01/17 Miki V220117R First Release/

http://www.e-linter.com 2/16 Wi-Fi Stick User Manual EESW-BU05 Content/

Content/

Revision History/ .......................................................................................................................................... 2 Content/ ........................................................................................................................................................................... 3 1. Brief/ ........................................................................................................................................................................... 4 1.1. Introduction/ ................................................................................................................................................. 4 1.2. Symbol/ .................................................................................................................................................. 4 2. Features/ ........................................................................................................................................................... 5 3. Package list/ ..................................................................................................................................................... 6 4. Indication/ ........................................................................................................................................................ 7 5. Installation and removal/ ........................................................................................................................ 8 5.1. Install the Magpie/ ......................................................................................................................... 8 5.2. Disassemble Magpie/ .................................................................................................................... 9 6. Communication Connection/ .................................................................................................................. 10 6.1. Wi-Fi Connection/ Wi-Fi ........................................................................................................................ 10 7. Download APP/ APP ............................................................................................................................................ 11 8. Installation qualification/ .......................................................................................................................... 12 9. LED indication and trouble shooting/LED ............................................................................. 13 10. Contact us/ ..................................................................................................................................................... 16 http://www.e-linter.com 3/16 Wi-Fi Stick User Manual EESW-BU05 Brief/

1. Brief/

1.1. Introduction/

Magpie is a Wi-Fi gateway. This manual describes the use of Magpie so that users can quickly use the product. This manual applies to the current software and hardware version. We reserve the right to change the content of the manual due to product upgrades. To prevent improper operation, please carefully read this manual before use. Magpie 1.2. Symbol/

Table 1-2-1 Symbol/

Symbol/

Indication/

"Attention" means there are potential risks, if not avoided, it may not operate normally or cause losses

"Danger" means that there is a potential hazard, which will cause injury if not avoided

"Tip" is used for important or key information to explain how to better use the product http://www.e-linter.com 4/16 Wi-Fi Stick User Manual EESW-BU05 Features/

2. Features/

USB communication USB Wi-Fi support AP+STA dual mode Wi-Fi AP+STA Automatic time synchronization when connected to internet Support OTA for gateway OTA Support OTA for inverter OTA Support local setting parameters for inverter by smart phone Support remote setting parameters for inverter by smart phone Support data breakpoint continuation Flame retardant grade: UL94 V-0 UL94 V-0 Anti-UV grade: F1 F1 Degree of protection: IPX7 IPX7 http://www.e-linter.com 5/16 Wi-Fi Stick User Manual EESW-BU05 Package list/

3. Package list/

Please check whether the package and accessories are complete. If any accessories are missing or obviously damaged, please contact the dealer. Table 3-1 Package list/

List/

Name/

Quantity/

Wi-Fi stick Wi-Fi 1 http://www.e-linter.com 6/16 Wi-Fi Stick User Manual EESW-BU05 Indication/

4. Indication/

A. USB-A interface: Connect to inverter and communication Fig. 4-1 Indication/

USB-A B. Hex nut: Fasten the Magpie C. Red LED: Inverter communication indication D. Green LED: Network communication indication E. Product label: Show product information 1. LED glow only when the Magpie is powered on. LED 2. When the Magpie is powered on, the green LED glows for 3S as a power on indication. 3 3. The more detail LED indication please refer chapter 9 LED indication and trouble shooting. LED 9 LED http://www.e-linter.com 7/16 Wi-Fi Stick User Manual EESW-BU05 Installation and removal/

5. Installation and removal/

This chapter introduce how to install the Magpie on the inverter and how to remove it. 5.1. Install the Magpie/

Insert the Magpie: as shown in the following figure, confirm the direction of the USB-A interface on the inverter firstly, and then insert the Magpie in arrow direction;

USB-A Fig. 5-1-1 Insert the Magpie/

Tighten the hex nut: as shown in the following figure, tighten the hex nut clockwise. Fig. 5-1-2 Tighten the hex nut/

http://www.e-linter.com 8/16 Wi-Fi Stick User Manual EESW-BU05 Installation and removal/

5.2. Disassemble Magpie/

Loosen the hex nut: as shown in the following figure, loosen the hex nut counterclockwise;

Fig. 5-2-1 Loosen the hex nut/

Pull out the Magpie: as shown in the following figure, pull out the Magpie in arrow direction. Fig. 5-2-2 Pull out the Magpie/

http://www.e-linter.com 9/16 Wi-Fi Stick User Manual EESW-BU05 Communication Connection/

6. Communication Connection/

This chapter introduce the configuration method of Wi-Fi communication. Wi-Fi When configuring the network, ensure that the Magpie is powered on!

Otherwise, check whether the inverter is powered on. 6.1. Wi-Fi Connection/ Wi-Fi The Wi-Fi connection diagram of Magpie is shown in the figure below. The specific process can be downloaded according to chapter 7 Download APP to download the APP, and configure the network connection according to the operation guide of the APP. Magpie Wi-Fi 7 APP APP APP Fig. 6-1-1 Wi-Fi connection diagram/Wi-Fi http://www.e-linter.com 10/16 Wi-Fi Stick User Manual EESW-BU05 Download APP/ APP 7. Download APP/ APP iOS: searchPV Pro in Apple Store, or scan the image below with a QR code. Android: search PV Pro in Google Play, or scan the image below with a QR code. Apple Store PV Pro Google Play PV Pro Fig. 7-1 APP QR code/APP http://www.e-linter.com 11/16 Wi-Fi Stick User Manual EESW-BU05 Installation qualification/

8. Installation qualification/

If the Magpie works normally, red LED and green LED are always glowing. Otherwise, it needs to be corrected by referring to chapter 9 LED indication and trouble shooting. 9 LED http://www.e-linter.com 12/16 Wi-Fi Stick User Manual EESW-BU05 LED indication and trouble shooting/LED 9. LED indication and trouble shooting/LED Red LED: Inverter communication indication/

Green LED: Network communication indication/

Table 9-1 the table of LED state/ LED LED State/

Indication/

Cycle for 2S: flash once quickly, then Communication is normal glowing 2S Not glow more than 20S The power supply to the Magpie is abnormal or damaged 1. Check whether the power supply of the 20S USB-A interface on the inverter is normal Cycle for 2S: flash once quickly, then off 2. Magpie abnormal, contact the dealer USB-A Communication failure Check whether the connection between the Magpie and inverter is loose or poor contact 2S When powered on, continuously Power on indication glows 3S, and then off 3S http://www.e-linter.com 13/16 Wi-Fi Stick User Manual EESW-BU05 LED indication and trouble shooting/LED Glow more than 5S 5S Communication is normal During the long glowing, flash Network transmit data occasionally Cycle for 20S: flash once quickly, then off 20S The route is not connected:

1. Check whether the password is right 2. Check the strength of the router 1. 2. Cycle for 20S: flash 3 times continuously, then off 20S Connect to the route, but can't connect to the cloud server 1. Check whether the router has Internet access permission 2. Check the firewall setting 1. 2. http://www.e-linter.com 14/16 Wi-Fi Stick User Manual EESW-BU05 LED indication and trouble shooting/LED Cycle for 20S: flash 4 times continuously, then off Magpie information error:

Contact the dealer 20S http://www.e-linter.com 15/16 Wi-Fi Stick User Manual EESW-BU05 Contact us/

10. Contact us/

Service email/: support@e-linter.com Switchboard/: 028-6787 8658 Service Call/: 028-6787 8658-621 Address 1: Floor 9, Building 10, Tianfu New Valley, No. 399, West Section of Fucheng Avenue, Chengdu, Sichuan, China 399 10 9 Address 2: Building 1, No. 206, Songshan Road, Suzhou, Jiangsu, China 206 1 http://www.e-linter.com 16/16 FCC 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.

(2)This device must accept any interference received, including interference that may cause undesired operation. 2. compliance could void the users authority to operate the equipment. 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. Changes or modifications not expressly approved by the party responsible for This equipment generates uses and can radiate radio frequence 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 equipmemt 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 autlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment . This equipment should be installed and operated with a minumum distance of 20 cm between the radiator and your body.

anjea sajea yD>11 OAc J) UOIaUUOD NIN-3 r Wi-Fi Stick i | P/N: EESW-BUOS

: SN: E27W 2320 0 1 KEY: UVWD SAyW Model: EESW-BUOS Input: DC4.8V-DC5.2V Made in China FCCID: 2BAG)-EESWBUU

1112 14 13 JX

WARNING:pdfminer.pdfpage:The PDF <_io.BufferedReader name='/Volumes/Scratch/Incoming/eg-scratch/6087649.pdf'> contains a metadata field indicating that it should not allow text extraction. Ignoring this field and proceeding. Use the check_extractable if you want to raise an error in this case OTA TEST REPORT Applicant Espressif System (Shanghai) Co.,Ltd Product ESP32-C3-MINI-1 Model ESP-ANT D-H Report No. Y2102A0260-T2 Issue Date March 9, 2021 TA Technology (Shanghai) Co., Ltd. tested the above equipment in accordance with the requirements in ANSI/IEEE Std 149-2008. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Preparedby:PengTao Approvedby:KaiXu TA Technology (Shanghai) Co., Ltd. No.145,JintangRd,TangzhenIndustryPark,PudongShanghai,China TEL:+8602150791141/2/3 FAX:+8602150791141/2/38000 OTA Test Report Report No: Y2102A0260-T2 TABLE OF CONTENTS 1. Test Laboratory .............................................................................................................................. 3 1.1. 1.2. 1.3. 1.4. Notes of the Test Report ................................................................................................... 3 Test facility ........................................................................................................................ 3 Testing Location ................................................................................................................ 3 Laboratory Environment .................................................................................................... 4 2. General Description of Equipment under Test ............................................................................... 5 2.1. Applicant and Manufacturer Information ............................................................................ 5 2.2. General information ........................................................................................................... 5 2.3. 2.4. 2.5. Test Date ........................................................................................................................... 5 Receiving Date .................................................................................................................. 5 Applied Standards ............................................................................................................. 6 3. Test Conditions .............................................................................................................................. 7 3.1. 3.2. Test Configuration ............................................................................................................. 7 Test Measurement ............................................................................................................. 7 4. Test Results ................................................................................................................................... 8 4.1. Gain and Efficiency ............................................................................................................ 8 5. Equipment List ............................................................................................................................... 9 ANNEX A 3-D Pattern Plots ................................................................................................................... 10 ANNEX BThe EUT Appearance and Test Configuration ...................................................................... 12 B.1 EUT Appearance ................................................................................................................... 12 B.2 Test Configuration ................................................................................................................. 13 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 2 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 1. Test Laboratory 1.1. Notes of the Test Report This report shall not be reproduced in full or partial, without the written approval of TA technology

(shanghai) co., Ltd. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein .Measurement Uncertainties were not taken into account and are published for informational purposes only. This report is written to support regulatory compliance of the applicable standards stated above. 1.2. Test facility A2LA (Certificate Number: 3857.01) TA Technology (Shanghai) Co., Ltd. has been listed by American Association for Laboratory Accreditation to perform measurement. 1.3. Testing Location Company:

TA Technology (Shanghai) Co., Ltd. Address:

No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China City:

Shanghai Post code:

201201 Country:

P. R. China Contact:

Xu Kai Telephone:

+86-021-50791141/2/3 Fax:

Website:

E-mail:

+86-021-50791141/2/3-8000 http://www.ta-shanghai.com xukai@ta-shanghai.com TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 3 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 1.4. Laboratory Environment Temperature Relative humidity Shield effect Ground resistance Min. =19Max. = 25 Min. =40%Max. =72%

0.7-6GHz

> 100dB

<0.5 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 4 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 2. General Description of Equipment under Test 2.1. Applicant and Manufacturer Information Applicant Name Espressif System (Shanghai) Co.,Ltd Applicant address Suite 204 Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China Manufacturer Name Espressif System (Shanghai) Co.,Ltd Manufacturer address Suite 204 Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China 2.2. General information Product Name:

ESP32-C3-MINI-1 EUT Description Model HW Version:

SW Version:

ESP-ANT D-H ESP32-C3-MINI-1 V1.1 esp32c3_phy_20210225_no_sleep_and_ampdu Antenna Type:

PCB Antenna Antenna Manufacturer:

Espressif System (Shanghai) Co.,Ltd 2402MHz ~ 2502MHz Test Frequency:

Note: The EUT is sent from the applicant to TA and the information of the EUT is declared by the applicant. All indications of Pass/Fail in this report are opinions expressed by TA Technology (Shanghai) Co., Ltd. based on interpretations and/or observations of test results. Measurement Uncertainties were not taken into account and are published for informational purposes only. Test lab. of the antenna gain and radiation pattern measurement: TA Technology (Shanghai) Co., Ltd. 2.3. Test Date The test is performed from February 25, 2021 to March 4, 2021. 2.4. Receiving Date The sample was received on February 25, 2021. TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 5 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 2.5. Applied Standards According to the specifications of the manufacturer, it must comply with the requirements of the following standards:

Test Method: ANSI/IEEE Std 149-2008 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 6 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 3. Test Conditions 3.1. Test Configuration Great-Circle-Cut method is used to measure the antenna 3D GAIN of EUT in OTA qualified anechoic chamber. Equipment Under Test (EUT) geometry centre vertical projection at the centre of platform, the distance from EUT to measurement antenna is 5m. 3.2. Test Measurement Spherical coordinate system Note: Theta is from 0~180 degree. Phi is from 0~360. Rotate the EUT and record the Data, the Figure 1 Test coordinate system step of rotation is 15 degree. Test Setup TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 7 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 4. Test Results 4.1. Gain and Efficiency Model Test State Frequency

(MHz) Efficiency

(dB) Efficiency

(%) Gain

(dBi) Directivity

(dBi) Note ESP-ANT D-

H Free Space 2402 2407 2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467 2472 2477 2482 2487 2492 2497 2502

-2.18

-1.99

-1.91

-1.82

-1.82

-1.99

-2.07

-1.96

-2.06

-2.08

-2.07

-2.05

-2.02

-2.27

-2.41

-2.21

-2.26

-2.28

-2.12

-2.03

-2.08 60.51 63.17 64.40 65.70 65.70 63.21 62.07 63.67 62.23 61.90 62.11 62.41 62.88 59.35 57.41 60.18 59.45 59.22 61.39 62.71 61.91 2.91 3.28 2.84 3.17 2.88 2.92 3.11 3.11 3.33 3.40 3.59 3.62 3.75 3.65 3.70 3.70 3.96 4.05 3.92 4.16 4.03 5.09 5.28 4.75 5.00 4.70 4.92 5.18 5.07 5.39 5.48 5.66 5.67 5.77 5.92 6.11 5.91 6.21 6.33 6.03 6.19 6.12 15 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 8 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 5. Equipment List Type of Equipment Manufacture Model Number S/N Calibration Date Expiration Time Network Analyzer Key sight E5071B MY42404014 2020-05-17 2021-05-16 Switch Control System Dual polarized horn antenna ETS ETS Software ETS-lindgren 7006/7001 00059957/MY 42001152 N/A N/A 3164-04 00062743 2020-04-14 2021-04-13 EMQ-100 Pattern Measurement software 1.09 N/A N/A TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 9 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 ANNEX A 3-D Pattern Plots Azimuth = 0.0 Elevation = 0.0 Roll = 0.0 Azimuth = 88.6 Elevation = -1.7 Roll = -95.3 Azimuth = -9.7 Elevation = -84.5 Roll = 79.4 Total Total Total Y Z Z X X Y X Y Z

) B d

e s n o p s e R

) B d

e s n o p s e R

) B d

e s n o p s e R 4 0

-4

-8

-12 4 0

-4

-8

-12 4 0

-4

-8

-12

) m B d

r e w o P 60 90 120

) m B d

r e w o P 60 90 120 30 0 330 Cut1 300 270 240 150 180 Angle (?

210 30 0 330 Cut2 300 270 240 150 210 180 Angle (?

Max: 3 Min: -8 Scale: 1/div Max: 6 Min: -10 Scale: 2/div 2502 MHz 2402 MHz 2407 MHz 2412 MHz 2417 MHz 2422 MHz 2427 MHz 2432 MHz 2437 MHz 2442 MHz 2447 MHz 2452 MHz 2457 MHz 2462 MHz 2467 MHz 2472 MHz 2477 MHz 2482 MHz 2487 MHz 2492 MHz 2497 MHz 2502 MHz 2402 MHz 2407 MHz 2412 MHz 2417 MHz 2422 MHz 2427 MHz 2432 MHz 2437 MHz 2442 MHz 2447 MHz 2452 MHz 2457 MHz 2462 MHz 2467 MHz 2472 MHz 2477 MHz 2482 MHz 2487 MHz 2492 MHz 2497 MHz TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 10 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2

) m B d

r e w o P 60 90 120 Cut3 300 270 240 30 0 330 150 180 Angle (?

210 Max: 2 Min: -10 Scale: 2/div 2502 MHz 2402 MHz 2407 MHz 2412 MHz 2417 MHz 2422 MHz 2427 MHz 2432 MHz 2437 MHz 2442 MHz 2447 MHz 2452 MHz 2457 MHz 2462 MHz 2467 MHz 2472 MHz 2477 MHz 2482 MHz 2487 MHz 2492 MHz 2497 MHz 2402MHz ~2502 MHz Wi-Fi 2.4G 3D Gain TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 11 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 ANNEX BThe EUT Appearance and Test Configuration B.1 EUT Appearance Picture 1 Constituents of EUT TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 12 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd. OTA Test Report Report No: Y2102A0260-T2 B.2 Test Configuration Picture 2 Test Setup

******END OF REPORT ******

TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 13 of 13 Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofTATechnology(Shanghai)Co.,Ltd.

ChengduELINTERInformationTechnologyCo.,Ltd. 2023-03-23 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern:

We, the undersigned, hereby authorize DongGuan Anci Electronic Technology Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, baoweihuang Project managers Chengdu E-LINTER Information Technology Co., Ltd. Floor 9, Building 10, No.399 West Section of FuchengAven. , Chengdu, Sichuan, China

ChengduELINTERInformationTechnologyCo.,Ltd. 2023323 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(i)requestfor(2BAGJEESWBU05) ChengduELINTERInformationTechnologyCo.,Ltd. (theapplicant)certifiesthatthe equipmentforwhichauthorizationissoughtisnotcoveredequipmentprohibited fromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCCrules. Sincerely,

(Applicantsignature)

(Applicantprintedname) baoweihuang ChengduELINTERInformationTechnologyCo.,Ltd. 2023323 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(ii)requestfor(2BAGJEESWBU05) ChengduELINTERInformationTechnologyCo.,Ltd.(theapplicant)certifiesthat,asof thedateofthefilingoftheapplication,theapplicantisnotidentifiedontheCovered Listasanentityproducingcoveredequipment. Sincerely,

(Applicantsignature)

(Applicantprintedname) baoweihuang

Chen ngdu E-L LINTER In nformati on Tech nology C Co., Ltd. Declarat D tion on model d differen nce Wet RFm nam theundersig moduleanda me. nedherebyc antenna,PCB confirmthat Blayout,sche thesemodel ematicsandc lsareidentic component. al,andallmo thedifferenc odelshaveth ceisthemod hesame del Prod nam duction me FCCID F Trad demark Modelno. WiF FiStick 2BAGJEESW 2 BU05 EESWBU0 EESWBU0 EESWBU0 EESWBU0 EESWB400 01, 00,EESWBU0 03, 02,EESWBU0 05, 04,EESWBU0 06,EESWBU0 07, 01 0,EESWB40 Sinc cerely, baow weihuang Proj ject manage ers Che Floo ngduELINT or9,Building ERInformati g10,No.399 ionTechnolo WestSectio ogyCo.,Ltd. nofFucheng gAven.,Che ngdu,Sichua an,China

Chengdu E-LINTER Information Technology Co., Ltd. 2023-03-23 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (EUT Name: Wi-Fi Stick /Model: EESW-

BU00, EESW-BU01, EESW-BU02, EESW-BU03, EESW-BU04, EESW-BU05, EESW-

BU06, EESW-BU07, EESW-B400, EESW-B401/FCC ID: 2BAGJ-EESWBU05) To Whom It May Concern:

This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Block Diagram ,Operational Description,Schematics) required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, baowei huang Project managers Chengdu E-LINTER Information Technology Co., Ltd. Floor 9, Building 10, No.399 West Section of FuchengAven. , Chengdu, Sichuan, China

Attestation Statements

(2023-3-23) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for Chengdu E-LINTER Information Technology Co., Ltd.the undersigned, hereby authorize VISHTEC LLC to act as our designated U.S. agent for service of process, Chengdu E-

LINTER Information Technology Co., Ltd..accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. VISHTEC LLC accepts the responsibility to act as designated U.S. agent for service of process. This agreement is valid until 03/23/2024 Applicant Information Company name: Chengdu E-LINTER Information Technology Co., Ltd. Contact Name: Baowei huang Address: Floor 9, Building 10, No.399 West Section of FuchengAven. , Chengdu, Sichuan, China Telephone No: +086 186 2526 5059 Email: support@e-linter.com Signature

[Baowei huang]

U.S. Agent Information:

Company Name: VISHTEC LLC Address: 9888 W Belleview Ave Ste 2142 Denver CO 80123 FRN: 0033407131 Contact Name: Alan Graham Telephone No: /

Email: Alan.graham@vish-tec.com Signature

[Alan Graham]