2A6J8-SA017AMS 3H

Shenzhen Tuozhu Technology Co., Ltd. Add: 401, West Zone, Hengchang Science and Technology Building, No.2228 LinhaiAvenue, NanshanStreet, Qianhai Shengang Cooperation Zone, Shenzhen, China Te l : +86 17722439889 Fax: +86 0755-86575393 E- mail: [email protected] Attestation Letter Date: 2026-09-08 FED ERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir or Madam: Our product AMS 3H , model: SA017 , FCC ID: 2A6J8-SA017 , for marketing purpose, this product only supports RFID 13.56MHz.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, Prin ted Name: Nina Ya n g Title: Compliance engineer

Shenzhen Tuozhu Technology Co., Ltd. Add: 401, West Zone, Hengchang Science and Technology Building, No.2228 LinhaiAvenue, NanshanStreet, Qianhai Shengang Cooperation Zone, Shenzhen, China Tel: +86 17722439889 Fax: +86 0755-86575393 E- mail: [email protected] CFR 47 §2.911(d)(5)(i)(ii) Attestation Letter Attes tation Letter Date: 2026-09-08 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Re f: Attestation Statements CFR 47 §2.911(d)(5)(i)(ii) Filing FCC ID: 2A6J8-SA017 Shenzhen Tuozhu 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. Shenz hen Tuozhu 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. Shenzhen Tuozhu Technology Co., Ltd. certifies that the equipment does not use Kaspersky's software information. Si ncerely, Si gnature Pr inted Name: Nina Yang Title: Compliance engineer

CFR 47 §2.911(d)(7) U.S Agent U.S. AGENT LETTER OF ATTESTATION Date: 2026-09-08 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: 2A6J8-SA017 Shenz hen Tuozhu Technology Co., Ltd. certifies that, as of the date of the filing of the application, Bambulab USA Inc is our designated U.S. agent for service of process for the above referenced FCC ID. Shenzhen Tuozhu 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. Bambulab USA Inc accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Des ignated U.S. Agent Information: Company Name: Bambulab USA Inc Address: 8000 Centre Park Dr, STE 330, Austin, TX, 78754 FRN: 0034121772 Tel.: +848-260-7186 Email: [email protected] Signed by (printed name): Qinming Lin Signature: Applicant: Shenzhen Tuozhu Technology Co., Ltd. Add: 401, West Zone, Hengchang Science and Technology Building, No.2228 LinhaiAvenue, NanshanStreet, Qianhai Shengang Cooperation Zone, Shenzhen, China FRN: 0032288847 Tel: +86 18576400227 Email: [email protected] Signed by (printed name): Nina Yang Signature:

QA-FR-170-B Shenzhen Tuozhu Technology Co., Ltd. Add: 401, West Zone, Hengchang Science and Technology Building, No.2228 LinhaiAvenue, NanshanStreet, Qianhai Shengang Cooperation Zone, Shenzhen, China Tel: +86 17722439889 Fax: +86 0755-86575393 E- mail: [email protected] FCC Authorization Date: 2026-09-08 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We , Shenzhen Tuozhu Technology Co., Ltd., Hereby authorizes Bay Area Compliance Laboratories Corp.(Shenzhen, Guangming) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. ( Shenzhen, Guangming) on our behalf shall have the same effect as our own action. We, the undersigned, hereby 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. This authorization is valid until further written notice from the applicant. Sin cerely Yours, Client’s signature Prin ted Name: Nina Yang Title: Compliance engineer

QA-FR-172 -A Shenzhen Tuozhu Technology Co., Ltd. Add: 401, West Zone, Hengchang Science and Technology Building, No.2228 LinhaiAvenue, NanshanStreet, Qianhai Shengang Cooperation Zone, Shenzhen, China Tel: +86 17722439889 Fax: +86 0755-86575393 E- mail: [email protected] FCC Confidential Authorization Date: 2026-09-08 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2A6J8-SA017 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Shenzhen Tuozhu Technology Co., Ltd. hereby requests long-term confidential treatment of information accompanying this application as outlined below: •Bl ock Diagram •Schematics •Operation Description As well as short-term (secrecy cycle: 180 days) confidential treatment of information accompanying this application as outlined below: •Internal Photos •User’s Manual •External Photos •Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Si ncerely, Signature Pr inted Name: Nina Yang Title: Compliance engineer

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked “#” is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. 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. Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.baclcorp.com.cn Rev:A/5.0 Page 1 of 6 TR-4-E-R052 TEST REPORT Applicant Name: Shenzhen Tuozhu Technology Co., Ltd. Address: 401, West Zone, Hengchang Science and Technology Building, No.2228 Linhai Avenue, Nanshan Street, Qianhai Shengang Cooperation Zone, Shenzhen, China Report Number: 2604V72274E-RF-00B FCC ID: 2A6J8-SA017 Test Standard (s) 47 CFR §2.1091 Sample Description Product Name: AMS 3H Model No.: SA017 Trade Mark: N/A Received Date: 2026-07-24 Report Date: 2026-09-05 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao Engineer Supervisor Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Report No.: 2604V72274E-RF-00B Rev:A/5.0 Page 2 of 6 TR-4-E-R052 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 3 GENERAL INFORMATION ............................................................................................................................ 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 4 OBJECTIVE ................................................................................................................................................... 4 TEST FACILITY .............................................................................................................................................. 4 MAXIMUM PERMISSIBLE EXPOSURE (MPE) ............................................................................................ 5 APPLICABLE STANDARD ................................................................................................................................. 5 CALCULATED RESULT.................................................................................................................................... 5 EXHIBIT A-EUT PHOTOGRAPHS ................................................................................................................ 6 Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Report No.: 2604V72274E-RF-00B Rev:A/5.0 Page 3 of 6 TR-4-E-R052 DOCUMENT REVISION HISTORY Revision Number Report Number Description of Revision Date of Revision Rev.00 2604V72274E-RF-00B Original Report 2026-09-05 Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Report No.: 2604V72274E-RF-00B Rev:A/5.0 Page 4 of 6 TR-4-E-R052 GENERAL INFORMATION Product Description for Equipment under Test (EUT) Product Name AMS 3H Tested Model SA017 Voltage Range # The RFID function of EUT is powered by DC 24V from the Printing section. Frequency Range 13.56 MHz Maximum E-Field Strength (Peak) (actual test result) 65.58 dBμV/m@3m Antenna Specification Coil Antenna Sample Serial Number 3QQN-1 (Assigned by BACL, Shenzhen, Guangming) Sample/EUT Status Good condition Objective This test report is in accordance with Part 2-Subpart J, Radiofrequency Radiation Exposure of the Federal Communication Commission rules. The tests were performed in order to determine compliance with 47 CFR §2.1091 rules. Test Facility The test site used by Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) to collect test data is located on the Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Accredited by American Association for Laboratory Accreditation (A2LA).The Certificate Number is 4297.01. Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Report No.: 2604V72274E-RF-00B Rev:A/5.0 Page 5 of 6 TR-4-E-R052 MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart 2.1091 systems operating under the provisions of this section shall be operated in a manner that ensures the public is not exposed to RF energy level in excess of the communication guidelines. Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (Minutes) 0.3-1.34 614 1.63 *(100) 30 1.34-30 824/f 2.19/f *(180/f 2 ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 f = frequency in MHz * = Plane-wave equivalent power density MPE Calculated Formulary: ● Predication of MPE limit at a given distance S = 2 4R PG  S = power density (in appropriate units, e.g. mW/cm 2 ) P = power input to the antenna (in appropriate units, e.g., mW). G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain. R = distance to the center of radiation of the antenna (appropriate units, e.g., cm) Calculated Result Frequency (MHz) Tune up EIRP # Evaluation Distance (cm) Power Density (mW/cm 2 ) MPE Limit (mW/cm 2 ) (dBm) (mW) 13.56 -29 0.001 20 0.0000003 0.98 Note 1: The tune-up EIRP is declared by the applicant. Note 2: E(dBuV/m)=EIRP(dBm)-95.2 for distance 3m Use the highest E-field strength(65.58 dBμV/m) for …

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The information marked ―#‖ is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. 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. Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.baclcorp.com.cn Rev:A/5.0 Page 1 of 21 TR-4-E-R007 TEST REPORT Applicant Name: Shenzhen Tuozhu Technology Co., Ltd. Address: 401, West Zone, Hengchang Science and Technology Building, No.2228 Linhai Avenue, Nanshan Street, Qianhai Shengang Cooperation Zone, Shenzhen, China Report Number: 2604V72274E-RF-00A FCC ID: 2A6J8-SA017 Test Standard (s) FCC PART 15.225 Sample Description Product Name: AMS 3H Model No.: SA017 Trade Mark: N/A Received Date: 2026-07-24 Report Date: 2026-09-05 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao Engineer Supervisor Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) Report No.: 2604V72274E-RF-00A Rev:A/5.0 Page 2 of 21 TR-4-E-R007 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 3 GENERAL INFORMATION ............................................................................................................................ 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 4 OBJECTIVE ................................................................................................................................................... 4 TEST METHODOLOGY .................................................................................................................................... 4 TEST FACILITY .............................................................................................................................................. 4 MEASUREMENT UNCERTAINTY ....................................................................................................................... 4 SYSTEM TEST CONFIGURATION ............................................................................................................... 5 DESCRIPTION OF TEST CONFIGURATION......................................................................................................... 5 EUT EXERCISE SOFTWARE ........................................................................................................................... 5 EQUIPMENT MODIFICATIONS .......................................................................................................................... 5 SUPPORT EQUIPMENT LIST AND DETAILS ....................................................................................................... 5 EXTERNAL I/O CABLE .................................................................................................................................... 5 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................. 6 SUMMARY OF TEST RESULTS ................................................................................................................... 8 TEST EQUIPMENT LIST ............................................................................................................................... 9 ANTENNA REQUIREMENT......................................................................................................................... 10 APPLICABLE STANDARD ............................................................................................................................... 10 ANTENNA CONNECTED CONSTRUCTION ....................................................................................................... 10 AC LINE CONDUCTED EMISSION ............................................................................................................. 11 APPLICABLE STANDARD ............................................................................................................................... 11 EUT SETUP ................................................................................................................................................ 11 EMI TEST RECEIVER SETUP ........................................................................................................................ 11 TEST PROCEDURE ...................................................................................................................................... 12 CALCULATION ............................................................................................................................................. 12 TEST DATA ................................................................................................................................................. 12 RADIATED EMISSIONS TEST .................................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................... 13 EUT SETUP ................................................................................................................................................ 13 EMI TEST RECEIVER SETUP .................................................................................................…

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Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 1 of 32 FCC&IC-13.56MHz APPENDIX A: TEST RESULT Appendix A.1: AC Line Conducted Emission Test Data Environmental Conditions Temperature: 24.4 °C Relative Humidity: 44 % ATM Pressure: 100.2 kPa Test Engineer: Homelander Dai Test Date: 2026-08-13 EUT Operation Mode: Transmitting Test Result: Compliance, please refer to the below data. Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 2 of 32 FCC&IC-13.56MHz With tag AC 120V/60Hz, Line: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 3 of 32 FCC&IC-13.56MHz AC 120V/60Hz, Neutral: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 4 of 32 FCC&IC-13.56MHz Without tag AC 120V/60Hz, Line: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 5 of 32 FCC&IC-13.56MHz AC 120V/60Hz, Neutral: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 6 of 32 FCC&IC-13.56MHz Appendix A.2: Radiated Emission Test Data For Radiated Spurious Emissions, this device is installed vertically in Y-axes orientation. It was provided by applicant. The Y-axes orientation was tested and recorded in the report. 9kHz-1GHz Environmental Conditions Temperature: 25.1 to 25.4 °C Relative Humidity: 52 to 54 % ATM Pressure: 99.2 kPa Test Engineer: Jayden Luo Test Date: 2026-09-01 to 2026-09-03 EUT Operation Mode: Transmitting Test Result: Compliance, please refer to the below data. Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 7 of 32 FCC&IC-13.56MHz With tag 9kHz~30MHz: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 8 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 9 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 10 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 11 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 12 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 13 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 14 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 15 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 16 of 32 FCC&IC-13.56MHz 30MHz~1GHz: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 17 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 18 of 32 FCC&IC-13.56MHz Without tag 9kHz~30MHz: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 19 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 20 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 21 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 22 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 23 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 24 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 25 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 26 of 32 FCC&IC-13.56MHz Fundamental Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 27 of 32 FCC&IC-13.56MHz 30MHz~1GHz: Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 28 of 32 FCC&IC-13.56MHz Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 29 of 32 FCC&IC-13.56MHz Appendix A.3: Frequency Stability Test Data Environmental Conditions Temperature: 25.2 °C Relative Humidity: 51 % ATM Pressure: 99.2 kPa Test Engineer: Jayden Luo Test Date: 2026-09-01 EUT Operation Mode: Transmitting (Radiated Measurement) Test Result: Compliance. Please refer to the below data. With tag Test Item Temperature (°C) Voltage (V AC ) Measured frequency (MHz) FCC Frequency Error (%) FCC Limit (%) ISED Frequency Error (ppm) ISED Limit (ppm) Frequency Stability vs. Temperature -20 120 13.56007129 0.00053 0.01 5.26 ±100 -10 13.56001605 0.00012 0.01 1.18 ±100 0 13.56009472 0.00070 0.01 6.99 ±100 10 13.56002851 0.00021 0.01 2.10 ±100 20 13.56005017 0.00037 0.01 3.70 ±100 25 13.56004383 0.00032 0.01 3.23 ±100 30 13.56003794 0.00028 0.01 2.80 ±100 40 13.56006248 0.00046 0.01 4.61 ±100 50 13.56008906 0.00066 0.01 6.57 ±100 Frequency Stability vs. Voltage 20 102 13.56001075 0.00008 0.01 0.79 ±100 20 138 13.56009124 0.00067 0.01 6.73 ±100 Bay Area Compliance Laboratories Corp. (Shenzhen, Guangming) No.: 2604V72274E-RFA Appendix A Page 30 of 32 FCC&IC-13.56MHz Without tag Test Item Temperature (°C) Voltage (V AC ) Measured frequency (MHz) FCC Frequency Error (%) FCC Limit (%) ISED Frequency Error (ppm) ISED Limit (ppm) Frequency Stability vs. Temperature -20 120 13.56001957 0.00014 0.01 1.44 ±100 -10 13.56008241 0.00061 0.01 6.08 ±100 0 13.56003619 0.00027 0.01 2.…

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