2AOMX-RETROBTJ3999CASSETTE RECORDER WITH USB & BLUETOOTH

QFX Inc. Statement We QFX Inc. Hereby Declare that The product CASSETTE RECORDER WITH USB & BLUETOOTH, models no. RETRO-39BT, RETRO-40, Retro-39BT, Retro-40, Retro-40BT, Retro-30BT, J-100BT, J-39BT, Retro-38BT, Retro-41 are all identical in interior structure, electrical circuits and components, and just the model names are different for the marketing requirement. Your assistance on this matter is highly appreciated. Yours sincerely, Signature: <Signature>： Name：Jack Liu Title：

November 17, 2022 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AOMX-RETROBTJ3999 Product Name: CASSETTE RECORDER WITH USB & BLUETOOTH Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: • Schematics • Block diagram • Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature>： Name：Jack Liu Title： Applicant Company：QFX Inc.

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Invert ed F Antenna Specification Summary ITEMANT SPEC Mo del Name 2.4G ANT Ho rizontalVertical 24 00MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Cent er Frequency -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dBi Po larizationHorizontal and Vertical A zimuth Beam Pattern Omni-directional Impedance50 Ohm A ntenna Length 38.20mm M anufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm ) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Label Location

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Report No.: TW2209270-01E Applicant: QFX Inc. Product: CASSETTE RECORDER WITH USB & BLUETOOTH Model No.: RETRO-39BT, RETRO-40, Retro-39BT, Retro-40, Retro-40BT, Retro-30BT, J-100BT, J-39BT, Retro-38BT, Retro-41 Trademark: QFX Test Standards: FCC Part 15.249 Test result: It is herewith confirmed and found to comply with the requirements set up by ANSI C63.10 & FCC Part 15 Subpart C, Paragraph 15.249 regulations for the evaluation of electromagnetic compatibility Approved By Terry Tang Manager Dated: October 10, 2022 Results appearing herein relate only to the sample tested The technical reports is issued errors and omissions exempt and is subject to withdrawal at SHENZHEN TIMEWAY TESTING LABORATORIES Zone C, 1st Floor, Block B, Jun Xiang Da Building, Zhongshan Park Road West, Tong Le Village, Nanshan District, Shenzhen, China Tel (755) 83448688, Fax (755) 83442996, E-Mail:[email protected] Report No.: TW2209270-01E Page 2 of 47 Date: 2022-10-10 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Special Statement： The testing quality ability of our laboratory meet with "Quality Law of People's Republic of China" Clause 19. The testing quality system of our laboratory meet with ISO/IEC-17025 requirements, which is approved by CNAS. This approval result is accepted by MRA of APLAC. Our test facility is recognized, certified, or accredited by the following organizations: CNAS-LAB Code: L2292 The EMC Laboratory has been assessed and in compliance with CNAS-CL01 accreditation criteria for testing Laboratories (identical to ISO/IEC 17025:2017 General Requirements) for the Competence of testing Laboratories. FCC-Registration No.: 744189 The EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications commission. The acceptance letter from the FCC is maintained in our files. Registration No.: 744189. Industry Canada (IC) —Registration No.:5205A The EMC Laboratory has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 5205A. A2LA (Certification Number:5013.01) The EMC Laboratory has been accredited by the American Association for Laboratory Accreditation (A2LA). Certification Number:5013.01 Report No.: TW2209270-01E Page 3 of 47 Date: 2022-10-10 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Test Report Conclusion Content 1.0 General Details ............................................................................................... 4 1.1 Test Lab Details................................................................................................ 4 1.2 Applicant Details.............................................................................................. 4 1.3 Description of EUT .......................................................................................... 4 1.4 Submitted Sample............................................................................................. 4 1.5 Test Duration................................................................................................... 5 1.6 Test Uncertainty................................................................................................ 5 1.7 Test By......................................................................................................... 5 2.0 List of Measurement Equipment......................................................................... 6 3.0 Technical Details............................................................................................. 7 3.1 Summary of Test Results.................................................................................... 7 3.2 Test Standards................................................................................................. 7 4.0 EUT Modification............................................................................................. 7 5.0 Power Line Conducted Emission Test..................................................................... 8 5.1 Schematics of the Test....................................................................................... 8 5.2 Test Method and Test Procedure............................................................................ 8 5.3 Configuration of the EUT..................................…

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Conducted Emission Test Setup: Radiated Emission Test Setup: