2AWQLW-IF-PBluetooth hearing aid

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang,China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] Date: 2023-07-21 Declaration FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: Our product Bluetooth hearing aid, Model number: W-IF-P, TW-IF-P, Leya-W-IF-P, Leya-ITC, Celesto-W-IF-P, FCC ID: 2AWQLW-IF-P, that has a left hearing aid and a right hearing aid. We would like to declare that the left hearing aid and right hearing aid are electrically identical. We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely, Signature: Li Bowen Quality Supervisor

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang,China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 07/21/2023 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: 2AWQLW-IF-P Hangzhou AcoSound Technology Co.,Ltd. certifies that the equipment for which authorization is sought, is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Signature: Contact Person: Li Bowen Title: Quality Supervisor

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang,China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 07/21/2023 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: 2AWQLW-IF-P Hangzhou AcoSound Technology Co.,Ltd. certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, Signature: Contact Person: Li Bowen Title: Quality Supervisor

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang,China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] Date: 2023-07-21 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attestation letter Dear Sir or Madam, Our product Bluetooth hearing aid, model: W-IF-P, TW-IF-P, Leya-W-IF-P, Leya-ITC, Celesto-W-IF-P, FCC ID: 2AWQLW-IF-P, for marketing purpose, this product only supports BLE 1M.The other functions, bands and modes was disabled to use by manufacturer in the software, the end user has no capability to activate it. Sincerely, Signature Li Bowen Quality Supervisor

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang,China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] Date: 2023-07-21 FCC certification No. Cover Letter We, Hangzhou AcoSound Technology Co.,Ltd., hereby submit justification for placing the FCC certification No. in the associated user’s manual and package. According to the FCC regulation, the FCC certification No. should be printed on the hearing aid, but as the hearing aid are too small to print the label (FCC ID: 2AWQLW-IF-P), it will be moved to the user manual and package. The details are as below: A. Side surface (A): The side surface does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. B. Top cover (B): The top cover does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. Conclusion: Based on the above description of area A to B, we conclude that the device is unquestionably too small for enabling the FCC certification No. to be printed onto any surface. We therefore request to move the FCC certification No. to the user’s manual and package. Label and label location: B A Best regards, Signature: Li Bowen Quality Supervisor

Hangzhou AcoSound Technology Co.,Ltd. Room 401,No.2 Building,No.1390 Cangxing Street,Yuhang,Hangzhou,Zhejiang, China Tel:+8618257251425 Fax: 0571-81021869 Email:[email protected] Product Similarity Declaration Date: 2023-07-21 Dear Sir/Madam, We, Hangzhou AcoSound Technology Co.,Ltd. hereby declare that we have a product named as Bluetooth hearing aid, (model: W-IF-P, FCC ID: 2AWQLW-IF-P) were tested by Shenzhen Accurate Technology Co., Ltd., Meanwhile, for our marketing purpose, we would like to list a series model (TW-IF-P, Leya-W-IF-P, Leya-ITC, Celesto-W-IF-P) on reports and certificate. All the models are identical in electrically, the difference among them is just the model name. No other changes were made to them. We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely Yours, Signature: Li Bowen Quality Supervisor

Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF External Photos Page 1 of 4 External photos Left Ear Right Ear Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF External Photos Page 2 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF External Photos Page 3 of 4 Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF External Photos Page 4 of 4 Battery Compartment

Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF Internal Photos Page 1 of 3 ` Internal photos Right Ear Left Ear Left Ear Right Ear Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF Internal Photos Page 2 of 3 Left Ear Left Ear Right Ear Right Ear Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF Internal Photos Page 3 of 3 ANT Left Ear Left Ear Right Ear

Shenzhen Accurate Technology Co., Ltd. Report No.: RA230718-41566E-RF-00 Version 8: 2023-01-30 Page 12 of 38 FCC- BLE FCC§15.247 (i), §1.1307 (b) (1) &§2.1093 – RF EXPOSURE Applicable Standard According to FCC §2.1093 and §1.1307(b) (1), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. According to KDB 447498 D01 General RF Exposure Guidance The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where 1. f(GHz) is the RF channel transmit frequency in GHz. 2. Power and distance are rounded to the nearest mW and mm before calculation. 3. The result is rounded to one decimal place for comparison. 4. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test Exclusion. Measurement Result For worst case: Mode Frequency (MHz) Max tune-up conducted power* (dBm) Max tune-up conducted power* (mW) Distance (mm) Calculated value Threshold (1-g SAR) SAR Test Exclusion BLE 2402-2480 1.0 1.26 5 0.4 3.0 Yes Result: Compliant.

★ Note: This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “ ”. Shenzhen Accurate Technology Co., Ltd. is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. 1/F., Building A, Changyuan New Material Port, Science & Industry Park, Nanshan District, Shenzhen, Guangdong, P.R. China Tel: +86 755-26503290 Fax: +86 755-26503290 Web: www.atc-lab.com Version 8: 2023-01-30 Page 1 of 38 FCC- BLE TEST REPORT Applicant Name : Hangzhou AcoSound Technology Co.,Ltd. Address : Room 401,No.2 Building,No.1390 Cangxing Street, Yuhang, Hangzhou, Zhejiang, China Report Number : RA230718-41566E-RF-00 FCC ID: 2AWQLW-IF-P Test Standard (s) FCC PART 15.247 Sample Description Product Type: Bluetooth hearing aid Model No.: W-IF-P Multiple Model(s) No.: TW-IF-P, Leya-W-IF-P, Leya-ITC, Celesto-W-IF-P Trade Mark: AcoSound Date Received: 2023/07/18 Report Date: 2023/07/26 Test Result: Pass* * In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Dave Liang Candy Li EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: RA230718-41566E-RF-00 Version 8: 2023-01-30 Page 2 of 38 FCC- BLE TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 4 GENERAL INFORMATION ....................................................................................................................................... 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 5 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 EUT EXERCISE SOFTWARE .......................................................................................................................................... 8 DUTY CYCLE ................................................................................................................................................................ 8 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 8 EXTERNAL I/O CABLE .................................................................................................................................................. 8 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 9 SUMMARY OF TEST RESULTS ............................................................................................................................. 10 TEST EQUIPMENT LIST ......................................................................................................................................... 11 FCC§15.247 (I), §1.1307 (B) (1) &§2.1093 – RF EXPOSURE ..................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 13 FCC §15.209, §15.205 & §15.247(D) - SPURIOUS EMISSIONS ............................................................................ 14 APPLICABLE STANDARD ............................................................................................................................................ 14 EUT SETUP ................................................................................................................................................................ 14 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 15 TEST PROCEDURE ...................................................................................................................................................... 15 FACTOR & MARGIN CALCULATION ..................................................................…

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产品技术规格书 Product technical specification 产品信息 product information： 产品 product： 镀银铜多股线 Silver-plated copper stranded wire 日期 date： Oct2021 版本 version： I 产品描述 Product description： 1、镀银铜多股线是由多股独立绝缘的微细漆包线绞合而成，每股 微细漆包线线芯为镀银纯铜线芯。Silver-plated copper multi-strand wire is formed by twisting a plurality of independently insulated micro-enameled wires, and each micro-enameled wire core is silver-plated pure copper wire core. 2、镀银纯铜线芯有利于低频，高频信号传输， 广泛应用于助听器 耳背机，耳内机以及耳机内部组装。Silver pure copper wire core is beneficial to low-frequency and high- frequency signal transmission, and is widely used in hearing aid behind-the-ear machine, in-ear machine and earphone internal assembly 技术规格 echnical specification： 线芯 core： 镀银铜 silver-plated copper 绝缘层 insulating barrier： 尼龙聚氨脂，2级 Nylon polyurethane, grade 2 单股直径 Single strand diameter： 0.05mm 股数 number of strands： 7股 7 shares 颜色可选 Color optional： 红/黄/绿 Red/yellow/green 电阻 electric resistance： <1.5Ω/m at20°C 击穿电压 breakdown voltage >550V 浸锡锡 Tin dipping： SAC305, 含银量3%，无铅 Silver content 3%, lead-free. 应用 application： 使用事项 Use matters： 1、不要挤压及过多弯折导线 don't squeeze and bend the wire too much. 2、建议使用无铅305焊锡进行焊接 It is recommended to use lead-free 305 solder for welding. 3、储存在凉爽干燥的环境中 Store in a cool and dry environment. 符合 accord with： ROHS, REACH 尺寸 L： 3 T1/T 寸 measure： 30mm T2:0.5mm T1 浸锡 Dipping Frequency Antenna Manufa 1 g tin y Range a Gain cturer 2400-248 -0.5dBi Hangzho Room 40 Street,Yu L+/-0.1mm 80MHz ou AcoSound 01,No.2 Build uhang,Hangz d Technology ding,No.1390 zhou,Zhejian 浸锡 Dip y Co.,Ltd. 0 Cangxing ng,China pping tin T2 2400MHz 2440MHz 2480MHz

Shenzhen Accurate Technology Co., Ltd. Project No.: RA230718-41566E-RF Test Photos Page 1 of 1 Photo of Radiated Emission Measurement (Below 1G) Photo of Radiated Emission Measurement (Above 1G)