2ASRB-S821Desktop Printer

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: USA MEIHUA TRADING INC FRN: 0033406166 Contact Name: Harley Quinn Address: 5379 Pine Valley Ct Boulder CO 80301 United States Telephone No: 1-312-363-9424 Email: [email protected] Applicant: Company name: Zhuhai Quin Technology Co., Ltd. Product Description: Desktop Printer Grantee code: 2ASRB FCC ID: 2ASRB-S821 Contact Name: Chloe Xu Address: ROOM 103-029(CENTRALIZED OFFICE AREA), 1F, BUILDING 1, NO. 18 FUTIAN ROAD, XIANGZHOU DISTRICT, ZHUHAI CITY, CHINA Telephone No: 0756-8699759 Email: [email protected] [Zhuhai Quin Technology Co., Ltd.] certifies that, as of the date of this filing of the application with the TCB, [USA MEIHUA TRADING INC] is our designated US agent for service of process for the above referenced FCC ID. [Zhuhai Quin 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 equipment. [USA MEIHUA TRADING INC] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 4.27.2023 Applicant’s Name: Chloe Xu US Agent’s Name: Harley Quinn Title: product manager Title: Manager Signature Signature

C5266091_X24_Ed.1 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Zhuhai Quin Technology Co., Ltd. Grantee code: 2ASRB FCC ID: 2ASRB-S821 Contact Name: Chloe Xu Address: ROOM 103-029(CENTRALIZED OFFICE AREA), 1F, BUILDING 1, NO. 18 FUTIAN ROAD, XIANGZHOU DISTRICT, ZHUHAI CITY, CHINA Telephone No: 0756-8699759 Fax No: 0756-2128969 Email: [email protected] i. [Zhuhai Quin 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. The applicant must sign this certification. ii. [Zhuhai Quin 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. The applicant must sign this certification. Date: 4.27.2023 Applicant’s Name: Chloe Xu Title: product manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Zhuhai Quin Technology Co., Ltd. Product Similarity Declaration Product name: Desktop Printer Model name: S821, S821K, S831, S831K, A821, A821K, A831, A831K, MR-S821, MR-S821K, MR-S831, MR-S831K FCC ID: 2ASRB-S821 We (Zhuhai Quin Technology Co., Ltd.) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Demonstrate the detail(descriptions and pictures) as to the difference list above. Signature: Name: Chloe Xu Title: product manager Date: 4.27.2023

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Zhuhai Quin Technology Co., Ltd. Address: ROOM 103-029(CENTRALIZED OFFICE AREA), 1F, BUILDING 1, NO. 18 FUTIAN ROAD, XIANGZHOU DISTRICT, ZHUHAI CITY, CHINA Product Name: Desktop Printer Model Number: S821, S821K, S831, S831K, A821, A821K, A831, A831K, MR- S821, MR-S821K, MR-S831, MR-S831K FCC Identifier: 2ASRB-S821 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Chloe Xu Date: 4/27/2023 Title: product manager Signature of applicant:

C5266091_X10_Ed.1 1/1 Zhuhai Quin Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 4/27/2023 Subject: Request for Confidentiality FCC ID: 2ASRB-S821 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Chloe Xu Date: 4/27/2023 Title: product manager

Page 1 of 3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Appendix - Ext Photos Model: S821 Page 2 of 3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Page 3 of 3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] ----End of Report----

Label Location

Page1of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Appendix - Int Photos Model: S821 Page2of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Page3of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Page4of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] ANT Page5of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Page6of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Page7of7 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] ----End of Report----

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] RF EXPOSURE Test Report Report No.: MTi221212003-03E4 Date of issue: 2023-04-26 Applicant: Zhuhai Quin Technology Co., Ltd. Product: Desktop Printer Model(s): S821, S821K, S831, S831K, A821, A821K, A831, A831K, MR-S821, MR-S821K, MR-S831, MR-S831K FCC ID: 2ASRB-S821 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6 - Report No.: MTi221212003-03E4 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 6 - Report No.: MTi221212003-03E4 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Test Result Certification Applicant: Zhuhai Quin Technology Co., Ltd. Address: ROOM 103-029(CENTRALIZED OFFICE AREA) , 1F, BUILDING 1, NO. 18 FUTIAN ROAD, XIANGZHOU DISTRICT, ZHUHAI CITY, CHINA Manufacturer: Zhuhai Quin Technology Co., Ltd. Address: ROOM 103-029(CENTRALIZED OFFICE AREA) , 1F, BUILDING 1, NO. 18 FUTIAN ROAD, XIANGZHOU DISTRICT, ZHUHAI CITY, CHINA Product description Product name: Desktop Printer Trademark: N/A Model name: S821 Serial Model: S821, S821K, S831, S831K, A821, A821K, A831, A831K, MR-S821, MR-S821K, MR-S831, MR-S831K Standards: N/A Test procedure: KDB 447498 D01 v06 Date of Test Date of test: 2023-04-14 ~ 2023-04-21 Test result: Pass Test Engineer : (Letter Lan) Reviewed By: : (Leon Chen) Approved By: : (Tom Xue) - Page 4 of 6 - Report No.: MTi221212003-03E4 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) MPE Calculation Method Friis transmission formula: Pd= (Pout*G)\ (4*pi*R 2 ) Where Pd= Power density in mW/cm 2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1415926 R= distance between observation point and center of the radiator in cm(20cm) Pd the limit of MPE, 1mW/cm 2 . If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. - Page 5 of 6 - Report No.: MTi221212003-03E4 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Measurement Result BT/BLE: Operation Frequency: 2402-2480MHz, Power density limited: 1mW/ cm 2 2.4GWiFi: Operation Frequency: WIFI 802.11b/g/n HT20: 2412-2462MHz, Power density limited: 1mW/ cm 2 Antenna Type: PCB Antenna; Antenna gain: -0.58dBi R=20cm mW=10^(dBm/10) antenna gain Numeric=10^(dBi/10)= 10^(-0.58/10)=0.87 BR+EDR: Channe l Freq. (MHz) modulation conducted power Tune- up power (dBm) Max Antenna Evaluation result Power density Limits (dBm) tune-up power Gain (mW/cm 2 ) (mW/cm 2 ) (dBm) (mW) (dBi) Numeric 2402 GFSK 5.33 6±1 7 5.012 -0.58 0.87 0.0009 1 2441 5.4 6±1 7 5.012 -0.58 0.87 0.0009 1 2480 5.17 6±1 7 5.012 -0.58 0.87 0.0009 1 2402 π/4- DQPSK 6.16 6±1 7 5.012 -0.58 0.87 0.0009 1 2441 6.3 6±1 7 5.012 -0.58 0.87 0.0009 1 2480 6.02 6±1 7 5.012 -0.58 0.87 0.0009 1 2402 8DPSK 6.56 6±1 7 5.012 -0.58 0.87 0.0009 1 2441 6.63 6±1 7 5.012 -0.58 0.87 0.0009 1 2480 6.42 6±1 7 5.012 -0.58 0.87 0.0009 1 BLE: Channel Freq. (MHz) modulation conducted power Tune- up power (dBm) Max Antenna Evaluation result Power density Limits (dBm) tune-up power Gain (mW/cm 2 ) (mW/cm 2 ) (dBm) (mW) (dBi) Numeric 2402 BLE-1M 5.11 5±1 6 3.981 -0.58 0.87 0.0007 1 2440 5.27 5±1 6 3.981 -0.58 0.87 0.0007 1 2480 5.02 5±1 6 3.981 -0.58 0.87 0.0007 1 - Page 6 of 6 - Report No.: MTi221212003-03E4 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] 2.4GWiFi: Channel Freq. (MHz) modulation conducted power Tune- up power Max Antenna Evaluation result at 20cm Power density Limits (dBm) (dBm) tune-up power Gain Power density(mW/cm 2 ) (mW/cm 2 ) (dBm) (mW) Numeric 2412 802.11b 16.32 16±1 17 50.119 0.87 0.00872 1 2437 16.67 16±1 17 50.119 0.87 0.00872 1 2462 16.3 16±1 17 50.119 0.87 0.00872 1 2412 802.11g 18.61 18±1 19 79.433 0.87 0.01383 1 2437 18.86 18±1 19 79.433 0.87 0.01383 1 2462 18.63 18±1 19 79.433 0.87 0.01383 1 2412 802.11n H20 19 19±1 20 100.000 0.87 0.01741 1 2437 19.34 19±1 20 100.000 0.87 0.01741 1 2462 18.9 19±1 20 100.000 0.87 0.01741 1 Conclusion: For the max result: 0.01741≤ 1.0 SAR, No SAR is required. ----END OF REPORT----

Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2450MHz 2500MHz 2400MHz 2450MHz 2500MHz Center Frequency -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dBL PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) PP PP PP PP Horizontal:2400 MHz2450 MHz2500 MHz Power (dBL) Max: 0 Min: -40 Scale: 5/div Gain(dBL) Frequency (MHz) MaxMinAvg 2400-1.26174-30.0801-7.18716 2450-0.765802-36.5604-7.48023 2500-0.585582-22.0315-6.59127 Vertical:2400 MHz2450 MHz2500 MHzPower (dBL) Max: 0 Min: -30 Scale: 5/div Gain(dBL) Frequency (MHz) MaxMinAvg 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.

Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136Web: www.mtitest.comE-mail: [email protected] Test Report Report No.: MTi221212003-03E1 Date of issue: 2023-04-26 Applicant: Zhuhai Quin Technology Co., Ltd. Product: Desktop Printer Model(s): S821, S821K, S831, S831K, A821, A821K, A831, A831K, MR-S821, MR-S821K, MR-S831, MR-S831K FCC ID: 2ASRB-S821 Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page2of67Report No.: MTi221212003-03E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. This test report shall not be partially reproduced without the written consent of the laboratory. 2. The test results in this test report are only responsible for the samples submitted 3. This test report is invalid without the seal and signature of the laboratory. 4. This test report is invalid if transferred, altered, or tampered with in any form without authorization. 5. Any objection to this test report shall be submitted to the laboratory within 15 days from the date of receipt of the report. Page3of67Report No.: MTi221212003-03E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of contents 1 General Description........................................................................................................................5 1.1 Description of the EUT .......................................................................................................................................5 1.2 Description of test modes...................................................................................................................................5 1.3 Test conditions....................................................................................................................................................7 1.4 Description of support units................................................................................................................................7 2 Measurement uncertainty...............................................................................................................8 3 Summary of Test Result..................................................................................................................9 4 Test Laboratory .............................................................................................................................10 5 Equipment List ..............................................................................................................................11 6 Test Result.....................................................................................................................................12 6.1 Antenna requirement........................................................................................................................................12 6.2 AC power line conducted emissions.................................................................................................................13 6.3 Radiated spurious emission .............................................................................................................................16 6.4 20dB emission bandwidth ................................................................................................................................25 6.5 Maximum conducted output power ..................................................................................................................26 6.6 Carrier frequency separation............................................................................................................................27 6.7 Time of occupancy............................................................................................................................................28 6.8 Number of hopping channels ...........................................................................................................................29 6.9 Band edge (Conducted) ...................................................................................................................................30 6.10 Conducted spurious emissions ......................................................................................................................31 Appendix A: 20dB Emission Bandwidth.............................................................................................32 Appendix B: Maximum conducted output power...............................................................................36 Appendix C: Carrier frequency separation.........................................................................................40 Appendix D: Time of occupancy.........................................................................................................42 Appendix E: Number of hopping channels.........................................................................................49 Appendix F: Band edge measurements..............................................................................................51 Appendix G: Conducted Spurious Emission......................................................................................56 Photographs of the Test Setup............................................................................................................66 Photographs of the EUT.......................................................................................................................67 Page4of67Report No.: MTi221212003-03E1 Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fu…

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Page 1 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - Test Setup Photos Model: S821 Radiated emissions – Below 1 GHz Radiated emissions – Above 1 GHz Page 2 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Conducted emissions ----End of Report----