2AB9W-MAX013D 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] This letter is to confirm that the US Agent for Service of Process accepts responsibility to act as a local representative on behalf of XYZprinting, Inc. 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. Applicant: Company name: XYZprinting, Inc. Product Description: 3D Printer Grantee code: 2AB9W FCC ID: 2AB9W-MAX01 Contact Name: Ren Chen Address: 10F.,No.99, Sec. 5, Nanjing E. Rd., Songshan Dist., Taipei City 10571, Taiwan Telephone No: 886-2-77058001 Email: [email protected] 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. This Agreement is valid until (03-01-2024). Date: 03-01-2023 Applicant’s Name: Ren Chen US Agent for Service of Process’s Name: Harley Quinn Title: Deputy Chief Engineer 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: XYZprinting, Inc. Grantee code: 2AB9W FCC ID: 2AB9W-MAX01 Contact Name: Ren Chen Address: 10F.,No.99, Sec. 5, Nanjing E. Rd., Songshan Dist., Taipei City 10571, Taiwan Telephone No: 886-2-77058001 Fax No: 886-2-77058001#27277 Email: [email protected] i. [XYZprinting, Inc.] (“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. [XYZprinting, Inc.] (“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: 2023/02/24 Applicant’s Name: Ren Chen Title: 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

XYZprinting, Inc. 1/1 Letter of Authorization Company: XYZprinting, Inc. Address: 10F.,No.99, Sec. 5, Nanjing E. Rd., Songshan Dist., Taipei City 10571, Taiwan Product Name: 3D Printer Model Number: da Vinci Max FCC Identifier: 2AB9W-MAX01 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: Ren Chen Date: 2023-02-24 Title: Deputy Chief Engineer Signature of applicant:

XYZprinting, Inc. 1/1 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2023-02-24 Subject: Request for Confidentiality FCC ID: 2AB9W-MAX01 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 NOTE 2 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 No ☐ Internal Photos No ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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: Ren Chen Title: Manager

SIZE:12mm*9mm Label Material: Laser laser Label color: silver gray The content of the label color: Black Label location Model: da Vinci Max 2AB9W-MAX01

ANT

FCC ID: 2AB9W-MAX01 RF Exposure Evaluation Limits 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) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 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 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 = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Test Result of RF Exposure Evaluation wifi 2.4G mode Channel Output power to antenna (dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm2) Limit (mW/cm2) Result 802.11b 17.19 52.36 0.01311 1.0 Pass 802.11g 14.50 28.18 0.00706 1.0 Pass 802.11n HT20 14.81 30.27 0.00758 1.0 Pass 802.11n HT40 14.10 25.70 0.00644 1.0 Pass Remark: antenna gain=1.0dBi

Summary Inverted Antenna Specification Passive Test Freq Effi Gain Gain Max Min (MHz) (dB) (dBi) (dBd) (dB) (dB) 2400 -2.35 0.09 -0.06 0.09 -13.07 2410 -2.32 0.19 -0.16 0.19 -13.1 2420 -2.34 0.23 -0.32 0.23 -12.84 2430 -2.13 0.44 -0.31 0.44 -12.11 2440 -1.78 0.38 -0.17 0.38 -11.38 2450 -1.53 0.23 -0.22 0.23 -10.9 2460 -1.5 1.00 -0.56 0.50 -10.89 2470 -1.41 0.45 -0.7 0.45 -11.05 2480 -1.32 0.11 -0.34 0.11 -11.42 2490 -1.22 0.28 -0.17 0.28 -12.02 2500 -1.38 0.48 -0.37 0.48 -12.5 Antenna Photo & Length (mm) Quick Reference Date PCB Antenna Model ESP8266A Frequency 2400~2500， Ant. Port Input Pwr. (dBm) 0 Tot. Rad. Pwr. (dBm) -2.3 (Input pwr – loss pwr) Peak EIRP(dBm) 1.3 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) -2.3 (58.5%) Gain (dBi) 1.0(Peak Gain) Maximum Power (dBm) 0.5 Minimum Power (dBm) -13.1 Manufacturer: Espressif Information Technology Co., Ltd. Address Room 204, Building 2, No. 690 Bibo Road, China (Shanghai) Pilot Free Trade Zone All the technical data and information contained herein are subject to change without prior notice

Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 52 FCC Part 15C Test Report FCC ID: 2AB9W-MAX01 Applicant: XYZprinting, Inc. Address: 10F.,No.99, Sec. 5, Nanjing E. Rd., Songshan Dist., Taipei City 10571, Taiwan Manufacturer: XYZprinting, Inc. Address: 10F.,No.99, Sec. 5, Nanjing E. Rd., Songshan Dist., Taipei City 10571, Taiwan EUT: 3D Printer Trade Mark: Model Number: da Vinci Max Date of Receipt: Feb. 15, 2022 Test Date: Feb. 15, 2022 – Feb. 24, 2022 Date of Report: Feb. 24, 2022 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Building C, Shuanghuan, No.8, Baoqing Road, Baolong Industrial Zone, Baolong Street, Longgang District, Shenzhen, Guangdong, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10:2013 Test Result: Pass Report Number: DL-20230223023E Prepared (Test Engineer): Pxing Huang 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. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 52 Table of Contents Page 1 . SUMMARY OF TEST RESULTS 4 1.1 MEASUREMENT UNCERTAINTY 4 2 . GENERAL INFORMATION 5 2.1 GENERAL DESCRIPTION OF EUT 5 2.2 DESCRIPTION OF TEST MODES 6 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 7 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 7 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 7 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 8 3 . EMC EMISSION TEST 9 3.1 CONDUCTED EMISSION MEASUREMENT 9 3.1.1 POWER LINE CONDUCTED EMISSION LIMITS 9 3.1.2 TEST PROCEDURE 9 3.1.3 DEVIATION FROM TEST STANDARD 9 3.1.4 TEST SETUP 10 3.1.5 EUT OPERATING CONDITIONS 10 3.1.6 TEST RESULTS 10 3.2 RADIATED EMISSION MEASUREMENT 13 3.2.1 RADIATED EMISSION LIMITS 13 3.2.2 TEST PROCEDURE 14 3.2.3 DEVIATION FROM TEST STANDARD 14 3.2.4 TEST SETUP 14 3.2.5 EUT OPERATING CONDITIONS 15 3.2.6 TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 16 3.2.7 TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 17 3.2.8 TEST RESULTS (1GHZ~25GHZ) 19 3.3 RADIATED BAND EMISSION MEASUREMENT 23 3.3.1 TEST REQUIREMENT: 23 3.3.2 TEST PROCEDURE 23 3.3.3 DEVIATION FROM TEST STANDARD 23 3.3.4 TEST SETUP 24 3.3.5 EUT OPERATING CONDITIONS 24 3.4 CONDUCTED BAND EDGE EMISSION&CONDUCTED SPURIOUS EMISSIONS MEASUREMENT 29 3.4.1 APPLICABLE STANDARD 29 3.4.2 TEST PROCEDURE 29 3.4.3 DEVIATION FROM STANDARD 29 3.4.4 TEST SETUP 29 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 52 Table of Contents Page 3.4.5 EUT OPERATION CONDITIONS 29 3.4.6 TEST RESULTS 29 4 . AVERAGE OUTPUT POWER 33 4.1 APPLIED PROCEDURES / LIMIT 33 4.1.1 TEST PROCEDURE 33 4.1.2 DEVIATION FROM STANDARD 33 4.1.3 TEST SETUP 33 4.1.4 EUT OPERATION CONDITIONS 33 4.1.5 TEST RESULTS 34 5 . POWER SPECTRAL DENSITY TEST 40 5.1 APPLIED PROCEDURES / LIMIT 40 5.1.1 TEST PROCEDURE 40 5.1.2 DEVIATION FROM STANDARD 40 5.1.3 TEST SETUP 40 5.1.4 EUT OPERATION CONDITIONS 40 5.1.5 TEST RESULTS 41 6 . 6DB BANDWIDTH TEST 44 6.1 APPLIED PROCEDURES / LIMIT 44 6.1.1 TEST PROCEDURE 44 6.1.2 DEVIATION FROM STANDARD 44 6.1.3 TEST SETUP 44 6.1.4 EUT OPERATION CONDITIONS 44 6.1.5 TEST RESULTS 45 7 . ANTENNA REQUIREMENT 48 7.1 STANDARD REQUIREMENT 48 7.2 EUT ANTENNA 48 8 . TEST SEUUP PHOTO 49 9 . EUT PHOTO 51 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 52 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.205, 15.209, 15.247(d) Radiated Spurious Emission PASS 15.205, 15.247(d) Band Edge Emission& Conducted Spurious Emissions PASS 15.247(b) Average Output Power PASS 15.247(a)(2) 6dB Bandwidth PASS 15.247(e) Power Spectral Density PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report 1.1 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 52 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Product Name: 3D Printer Trademark Model No.: da Vinci Max SHERD-0X-6BA(“X” =0 to 10000, indicating different serial numbers. "B" =A-Z, indicating different shell colors.) Model Difference The product's different for model number and appearance color. Operation Frequency: 2412~2462 MHz for 802.11b/g/nHT20 2422~2452 MHz for 802.11nHT40 Channel numbers: 11 Channels for 802.11b/g/n(HT20) 7 channels for 802.11nHT40 Channel separation: 5MHz Modulation technology: 802.11b: DSSS (CCK, DQPSK, DBPSK) 802.11g/n(20): DSSS (CCK, DQPSK,DBPSK)+OFDM (QPSK, BPSK, 16-QAM, 64-QAM) Rate of Transmitter 802.11b: 11/5.5/2/1Mbps 802.11g: 54/48/36/24/18/12/9/6Mbps 802.11n: up to 150Mbps Antenna Type: PCB Antenna Antenna gain: 1.0dBi Power supply: AC 100-240V 50/60Hz Note: 1.For a more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. 2.The EUT’s all information provided by client. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230223023E Test Report Tel: 400-688-…

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Radiated Measurement Photos Conducted Measurement Photos