RVU-ZJ-5820Portable Thermal Printer

SHENZHEN ZIJIANG ELECTRONICS CO., LTD 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: Dec. 24, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID:RVU-ZJ-5820 SHENZHEN ZIJIANG ELECTRONICS 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, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: GongHai Wang Title: General Manager Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Tel.: 86-755-29005719 Email: [email protected]

1 | P a g e SHENZHEN ZIJIANG ELECTRONICS CO., LTD 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Attestation Statements To: Federal Communications Commission Date: Dec. 24, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: [RVU-ZJ-5820] Product Name: [Portable Thermal Printer] This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature: Printed Name: GongHai Wang Title: General Manager Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Tel.: 86-755-29005719 Email: [email protected] 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☒ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ The Memory used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. Compliance ☒ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check

SHENZHEN ZIJIANG ELECTRONICS CO., LTD 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: Dec. 27, 25 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: [RVU-ZJ-5820] [SHENZHEN ZIJIANG ELECTRONICS CO., LTD] (“the applicant”) certifies that, as of the date of the filing of the application, [MIRAMONT SOLUTIONS LLC] (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. [MIRAMONT SOLUTIONS LLC] ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: MIRAMONT SOLUTIONS LLC FRN: 0036313369 GC: Address:19 GEORGETOWN, IRVINE, CA92612 United States Signature: Contact Person: Wenyi Wang Tel: (951) 401-3633 Email: [email protected] Applicant Company Name: SHENZHEN ZIJIANG ELECTRONICS CO., LTD FRN: 0022375208 Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Signature: Contact Person: GongHai Wang Tel: 86-755-29005719 Email: [email protected]

SHENZHEN ZIJIANG ELECTRONICS CO., LTD 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 12/24/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: RVU-ZJ-5820 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below :  Block Diagram  Schematics  Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180) days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOM in the event information regarding the product or the product is made available to the public before the requested period has expired.  User Manual  Internal Photos  Test Setup Photos Sincerely, (Signature) Printed Name: GongHai Wang Title: General Manager Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Tel.: 86-755-29005719 Email: [email protected]

SHENZHEN ZIJIANG ELECTRONICS CO., LTD 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Date: Dec. 24, 25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID:RVU-ZJ-5820 I, the undersigned, hereby authorize (Shenzhen DL Testing Technology Co., Ltd.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Shenzhen DL Testing Technology Co., Ltd.) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (SHENZHEN ZIJIANG ELECTRONICS CO., LTD). We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, Applicant Signature: Printed Name: GongHai Wang Title: General Manager Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Tel.: 86-755-29005719 Email: [email protected]

SHENZHEN ZIJIANG ELECTRONICS CO .,LTD Model Difference Product description: Portable Thermal Printer Model name: ZJ-5820, POS-5820 Trade Name: N/A FCC ID:RVU-ZJ-5820 All the model are the same circuit and RF module, except model names and appearance color. Regards Sincerely Client’s signature: Client’s name / title: GongHai Wang/ General Manager Contact information / address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110

FCC ID:RVU-ZJ-5820 EUT PHOTO(External Photos) FCC ID:RVU-ZJ-5820 FCC ID:RVU-ZJ-5820 FCC ID:RVU-ZJ-5820

Label & label location 30mm*20mm FCC ID:RVU-ZJ-5820 Label location

FCC ID:RVU-ZJ-5820 RF Exposure Evaluation According to WS-1 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 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 Here, For BLE: Mode Power(dBm) Tune up Power (dBm) Max. Tune up Power (dBm) Max. Tune up Power (mW) Frequency (MHz) Min. distance (mm) Calc. thresholds limit GFSK -6.66 -7±1 -6 0.25 2402 5 0.08 3.0 GFSK -7.54 -7±1 -6 0.25 2440 5 0.08 3.0 GFSK -9.28 -9±1 -8 0.16 2480 5 0.05 3.0 For BDR: Mode Power(dBm) Tune up Power (dBm) Max. Tune up Power (dBm) Max. Tune up Power (mW) Frequency (MHz) Min. distance (mm) Calc. thresholds limit GFSK -6.61 -7±1 6 0.25 2402 5 0.08 3.0 GFSK -7.67 -7±1 6 0.25 2441 5 0.08 3.0 GFSK -9.21 -9±1 -8 0.16 2480 5 0.05 3.0 The Product unsupported at the same time to Transmitting. Result: No Standalone SAR test is required.

BluetoothAntenna specification&Testreport YichipMicroelectronics ©2014 AntennatypeAntennatype PCBAntennaPCBAntenna antennadesignspecification Antennadimensionsasblowpictureshow:thematerialisFR4andthethicknessis 1.6mmofPCB. GianandEfficiency Frequency (MHz) Efficiency(%)Gain(dBi) 230013.17-1.57 232019.08-0.76 234022.65-0.41 236022.62-0.12 238018.03-0.42 240014.86-0.93 242012.54-1.17 24409.92-2.03 24607.46-2.47 24806.11-2.98 25005.39-3.83 3Dand1DRadiationPatterns Total P o w e r ( d B m ) -25 0 -20 -15 -10 -5 X Y Z Azimuth = 0.0 Elevation = 0.0 Roll = 0.0 2440MTRP1 Cut1 P o w e r ( d B m ) Angle (? Scale: 2/div Min: -16 Max: -2 0 180 30 210 60 240 90270 120 300 150 330 Cut2 P o w e r ( d B m ) Angle (? Scale: 2/div Min: -22 Max: 0 0 180 30 210 60 240 90270 120 300 150 330 Cut3 P o w e r ( d B m ) Angle (? Scale: 2/div Min: -14 Max: -2 0 180 30 210 60 240 90270 120 300 150 330

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Report No.: DLE-251126005R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 44 FCC Part 15C Test Report FCC ID:RVU-ZJ-5820 Applicant: SHENZHEN ZIJIANG ELECTRONICS CO .,LTD Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 Manufacturer: SHENZHEN ZIJIANG ELECTRONICS CO .,LTD Address: 4 Floor of No.2 Building of Donglongxing Science Park, Huaning Road, Dalang Street, Longhua District Shenzhen China 518110 EUT: Portable Thermal Printer Trade Mark: N/A Model Number: ZJ-5820, POS-5820 Date of Receipt: Nov. 26, 2025 Test Date: Nov. 26, 2025 to Dec. 11, 2025 Date of Report: Dec. 11, 2025 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Building C, Shuanghuan, No.8, Baoqing Road Baolong Industrial Zone, Baolong Street, Longgang Shenzhen, Guangdong, China. Applicable Standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Result: Pass Report Number: DLE-251126005R Prepared (Test Engineer): Dimon Tan Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. C DL-Cert ert DL-Cert DL D L-Cert DL-Cert DL-Cer D L-Cert DL-Cert DL-Cert Cert D L-Cert DL-Cert DL-Cert DL-C DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert ert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert D DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Ce DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL- DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert ert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-C DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert ert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Ce L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert D DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-C L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert rt DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Ce DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-C L-Cert DL-Cert DL-Cert DL-Cert D L-Cert DL-Cert rt DL-Cert DL-Cert DL-Cert D L-Cert DL-Ce DL-Cert DL-Cert DL-Cert D L-Cert DL Cert DL-Cert DL-Cert D L-Cert DL-Cert DL-Cert D L-C L-Cert DL-Cert rt DL-Cer DL Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251126005R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 44 Table of Contents Page TABLE OF CONTENTS ......................................................................................................... 2 1. VERSION ............................................................................................................................. 5 2. TEST SUMMARY ................................................................................................................ 6 2.1 TEST FACILITY ............................................................................................................................ 7 2.2 MEASUREMENT UNCERTAINTY .......................................................................................... 7 3. GENERAL INFORMATION ............................................................................................... 8 3.1 GENERAL DESCRIPTION OF EUT ............................................................…

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