2BKEH-DGTYC3C Battery BOX

One Distribution Center Circle, Suite 1 Littleton, MA 01460 Tel: +1 978 486 8880 Email: certification@ bureauveritas.com Page 1 of 2 SCS-F235 Attestation of Covered List Rev 1.0 Attestation of Covered List Reason for Amendment Revision # Approved Date To Initial Release 1.0 Jul-01-2024 Dongguan Tianyu electronic technology Co., LTD Letter of Attestation of Covered List Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-12-2024 FCC ID: 2BKEH-DGTYC Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing [Dongguan Tianyu electronic technology Co., LTD] (“the applicant”) 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing [Dongguan Tianyu electronic technology Co., LTD] (“the applicant”) 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. Cover List Link: (https://www.fcc.gov/supplychain/coveredlist) Applicant: Dongguan Tianyu electronic technology Co., LTD Address: Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong Contact Person: Wang shangqing Tel.: 13539016775 Email: [email protected] Sincerely,

One Distribution Center Circle, Suite #1 Littleton, MA 01460 Tel: +1 978 486 8880 Email: [email protected] Website: https://www.cps.bureauveritas.com/ Page 1 of 2 SCS-F236 Attestation of US Agent for Service Process Rev 1.0 Attestation of US Agent for Service Process Reason for Amendment Revision # Approved Date To Initial Release 1.0 Jul-01-2024 Dongguan Tianyu electronic technology Co.,LTD Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA FCC ID: 2BKEH-DGTYC D ate of Filing to TCB: 09-12-2024 Ref: Attestation Statements Part 2.911(d)(7) Filing [Dongguan Tianyu electronic technology Co.,LTD] (“the applicant”) certifies that, as of the date of the filing of the application, [FCC US Agent, LLC] is our designated U.S. agent for service of process for the above referenced FCC ID. [Dongguan Tianyu electronic 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 and will notify the TCB/FCC in a timely manner if the US Processing Agent changes. [FCC US Agent, LLC] accepts, as of the date of the filing of the applic ation, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, (Applicant printed name) Wang shangqing (Applicant signature) (US Local Agent printed name) Tim Payne (US Local Agent signature)

One Distribution Center Circle, Suite 1 Littleton, MA 01460 Tel: +1 978 486 8880 Email: [email protected] Website: https://www.cps.bureauveritas.com/ SCS-F019: Confidentiality Request Letter Page 1 of 2 Rev 9.0 Confidentiality Request Letter Reason for Amendment (current / obsolete) Revision History Approved Date From To Initial Release (obsolete) 1.0 1.0 Nov-14-2006 Adding CFR 2.459 (obsolete) 1.0 2.0 August – 11 - 2008 Updated company template & Added text box (obsolete) 2.0 3.0 Jan-31-2012 Added IC confidentiality letter form (obsolete) 3.0 4.0 March-26-2015 Corrections to STC form. Added reference to KDB (obsolete) 4.0 5.0 Nov-19-2015 Updated company logo (current) 5.0 6.0 Jun-26-2019 Updated References and Contact Info 6.0 7.0 Aug-30-2020 Updated BV Company Address 7.0 8.0 Nov-28-2023 FCC - Added SDR Software/Security Information, replaced word permanent with Long-Term ISED – added SDR Software and Security Info 8.0 9.0 May-15-2024 Dongguan Tianyu electronic technology Co.,LTD SCS-F019: Confidentiality Request Letter Page 2 of 2 Rev 9.0 2024-9-12 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046-1609 Cc: Bureau Veritas Consumer Products Services Inc. One Distribution Center Circle, Suite 1 Littleton, MA 01460 Subject: Confidentiality Request for FCC ID: 2BKEH-DGTYC Pursuant to CFR 47 sections 0.457 and 0.459, we respectfully request permanent confidential treatment of the following Exhibits accompanying this application be held confidential: Type of Confidentiality Requested Exhibit Short Term Long Term Block Diagram Short Term External Photos Short Term Long Term *** Internal Photos Short Term Long Term Operational Description/Theory of Operation Short Term Long Term Parts List Short Term Long Term Tune-Up Procedure Short Term Long Term Schematics Short Term Test Setup Photos Short Term Long Term *** User’s Manual Long Term ** SDR Software/Security Information **Automatically held Long Term Confidential *** Long Term confidentiality may be requested in accordance with FCC KDB 726920 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. 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: To avoid premature release of sensitive information prior to marketing or release of the product to the public, the applicant requests the following documents contained in this certification application be temporarily withheld from public disclosure for an initial period of 45 or 180 days; or for a specified date of not to exceed 180 days from the Grant Date The applicant understands that disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Client’s signature: Client’s name & title: Wang shangqing/Manager Contact information / address: Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong

Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel.: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 1 of 3 Report Version A Reference No.: 2408WDG0147 PHOTOGRAPHS OF THE EUT Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel.: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 2 of 3 Report Version A Reference No.: 2408WDG0147 Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel.: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 3 of 3 Report Version A Reference No.: 2408WDG0147

MODEL ： RM-TY433-18K FCC ID: 2BKEH-DGTYC This device complies with Part 15 of the FCC Rules. Opera-on is subject to the following two condi-ons : (1)this device may not cause harmful interference, and (2) this device must accept any interference recei ved, including interference that may cause undesired operation. FCC LABLE 35mm 15mm

Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 1 of 7 Report Version A Test Report No.: FM2408WDG0147 RF EXPOSURE REPORT Applicant Dongguan Tianyu electronic technology Co., LTD Address Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong Manufacturer or Supplier Dongguan Tianyu electronic technology Co., LTD Address Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong Product 3C Battery BOX Brand Name N/A Model RM-TY433-18K Additional Model & Model Difference N/A Date of tests Aug. 15, 2024 ~ Sep. 10, 2024 FCC Part 2 (Section 2.1093) KDB 447498 D01 V06 IEEE C95.1 CONCLUSION: The submitted sample was found to COMPLY with the test requirement Tested by Loren Luo Project Engineer / EMC Department Approved by Glyn He Assistant Manager / EMC Department Date: Sep. 14, 2024 This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our-business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 2 of 7 Report Version A Test Report No.: FM2408WDG0147 TABLE OF CONTENTS RELEASE CONTROL RECORD ................................................................................ 3 1. CERTIFICATION .............................................................................................. 4 2. RF EXPOSURE DEFINE ................................................................................. 5 3. CLASSIFICATION ........................................................................................... 5 4. SAR TEST EXCLUSION THRESHOLDS ........................................................ 6 Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 3 of 7 Report Version A Test Report No.: FM2408WDG0147 RELEASE CONTROL RECORD ISSUE NO. REASON FOR CHANGE DATE ISSUED FM2408WDG0147 Original release Sep. 14, 2024 Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 4 of 7 Report Version A Test Report No.: FM2408WDG0147 1. CERTIFICATION FCC ID: 2BKEH-DGTYC PRODUCT: 3C Battery BOX BRAND NAME: N/A MODEL NO.: RM-TY433-18K ADDITIONAL MODELS N/A APPLICANT: Dongguan Tianyu electronic technology Co., LTD STANDARDS: FCC Part 2 (Section 2.1093) KDB 447498 D01 V06 IEEE C95.1 Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 5 of 7 Report Version A Test Report No.: FM2408WDG0147 2. RF EXPOSURE DEFINE The corresponding SAR Exclusion Threshold condition, listed below: 1) 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,16 where   f(GHz) is the RF channel transmit frequency in GHz   Power and distance are rounded to the nearest mW and mm before calculation   The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 2) At 100 MHz to 6 GHz and for test separation distances > 50 mm, the SAR test exclusion threshold is determined according to the following: a) [Threshold at 50 mm in step 1) + (test separation distance - 50 mm)·( f(MHz)/150)] mW, at 100MHz to 1500 MHz b) [Threshold at 50 mm in ste…

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Length: 6mm Antenna Type:Antenna Antenna Gain: dBi Antenna operates frequency range: 433.92MHz Only radiated measurements are used to show compliance with FCC limits for fundamental and spurious emissions. PCB 0

Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 1 of 27 Report Version A Test Report No.: RF2408WDG0147 TEST REPORT Applicant Dongguan Tianyu electronic technology Co., LTD Address Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong Manufacturer or Supplier Dongguan Tianyu electronic technology Co., LTD Address Room 102, Building 1, No. 2, Dali Lushu Street, Qingxi Town, Dongguan City, Guangdong Product 3C Battery BOX Brand Name N/A Model RM-TY433-18K Additional Model & Model Difference N/A Date of tests Aug. 15, 2024 ~ Sep. 10, 2024 the tests have been carried out according to the requirements of the following standards: FCC Part 15, Subpart C, Section 15.231 CONCLUSION: The submitted sample was found to COMPLY with the test requirement Tested by Loren Luo Project Engineer / EMC Department Approved by Glyn He Assistant Manager / EMC Department Date: Sep. 14, 2024 This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our-business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 2 of 27 Report Version A Test Report No.: RF2408WDG0147 TABLE OF CONTENTS RELEASE CONTROL RECORD ................................................................................................................ 4 1 SUMMARY OF TEST RESULTS........................................................................................................ 5 2 MEASUREMENT UNCERTAINTY ..................................................................................................... 5 3 GENERAL INFORMATION ................................................................................................................ 6 3.1 GENERAL DESCRIPTION OF EUT .............................................................................................. 6 3.2 DESCRIPTION OF TEST MODES ................................................................................................ 6 3.3 TEST MODE APPLICABILITY AND TESTED CHANNEL DETAIL ................................................ 7 3.4 GENERAL DESCRIPTION OF APPLIED STANDARDS ............................................................... 9 3.5 DESCRIPTION OF SUPPORT UNITS .......................................................................................... 9 4. TEST TYPES AND RESULTS .......................................................................................................... 10 4.1 RADIATED EMISSION MEASUREMENT ................................................................................... 10 4.1.1 LIMITS OF RADIATED EMISSION MEASUREMENT ........................................................ 10 4.1.2 TEST INSTRUMENTS ........................................................................................................ 11 4.1.3 TEST PROCEDURES ......................................................................................................... 12 4.1.4 TEST SETUP ...................................................................................................................... 13 4.1.5 DEVIATION FROM TEST STANDARD ............................................................................... 14 4.1.6 EUT OPERATING CONDITIONS ....................................................................................... 14 4.1.7 TEST RESULTS .................................................................................................................. 15 4.2 20DB BANDWIDTH MEASUREMENT ........................................................................................ 20 4.2.1 LIMITS OF 20DB BANDWIDTH MEASUREMENT ............................................................. 20 4.2.2 TEST INSTRUMENTS ........................................................................................................ 20 4.2.3 TEST PROCEDURE ........................................................................................................... 21 4.2.4 DEVIATION FROM TEST STANDARD ............................................................................... 21 4.2.5 TEST SETUP ...............…

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Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel.: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 1 of 2 Report Version A Reference No.: 2408WDG0147 SET-UP FOR RADIATED EMISSION TEST Frequency Range< 30MHz~1GHz > Bureau Veritas Shenzhen Co., Ltd. Dongguan Branch No. 96, Guantai Road (Houjie Section), Houjie Town, Dongguan City, Guangdong Province. 523942. People’s Republic of China. Tel.: +86 769 8998 2098 Fax: +86 769 8593 1080 Email: [email protected] Page 2 of 2 Report Version A Reference No.: 2408WDG0147 Frequency Range< Above 1GHz >