VYY1554EV01Connector Mini Bridge

This device complies with Part 15 of the FCC Rules / Innovation, Science and EconomicDevelopment Canada’s licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. WARNING *Can only be used with a power adapter, not for computer equipment (including laptop/notebook/netbook)

Rev 1/26/2023 NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 08-17-2023 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: VYY1554EV01 NINGBO DOOYA MECHANIC & ELECTRONIC 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. Sincerely, Applicant signature: Xiaofang Liao Applicant printed name: Rev 1/26/2023

Rev 1/26/2023 NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 08-17-2023 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: VYY1554EV01 NINGBO DOOYA MECHANIC & ELECTRONIC 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Applicant signature: Xiaofang Liao Applicant printed name:

Rev 1/26/2023 NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 08-17-2023 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: VYY1554EV01 Applicant FRN: 0017345455 NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. certifies that, as of the date of the filing of the application, UBlockout, Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. NINGBO DOOYA MECHANIC & 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. UBlockout, 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. Designated U.S. Agent Information: Name: UBlockout, Inc. U.S. Agent FRN: 0033741273 Address: 10580 Newkirk Street Suite 301, Dallas, Texas 75220, United States Contact Person: Luke Boorman Tel.: (888) 441-6208 Email: [email protected] Sincerely, NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. UBlockout, Inc. Xiaofang Liao Luke Boorman

NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Date: 2023-08-17 To: Federal Communications Commission 7435 Oakland Mills Road Columbia MD FCC ID: VYY1554EV01 To Whom It May Concern: This letter is to ascertain that NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Product name: Connector Mini Bridge, Model: DD1554E has been the units used for conducting FCC compliance testing, the SDoC part will be tested by FCC recognized test lab. If you have any question or concerns, please contact us. Sincerely, Company name: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Address: No.168 Shengguang Road, Luotuo, Zhenhai, Ningbo ZHEJIANG,China E-mail: [email protected] Tel: +86-574-26286921 Printed Name: Xiaofang Liao Signature

External Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 1 of 3 Product: Connector Mini Bridge FCC ID: VYY1554EV01 External Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 2 of 3 Product: Connector Mini Bridge FCC ID: VYY1554EV01 External Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 3 of 3 Product: Connector Mini Bridge FCC ID: VYY1554EV01

Internal Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 1 of 4 Product: Connector Mini Bridge FCC ID: VYY-1554EV01 Internal Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 2 of 4 Product: Connector Mini Bridge FCC ID: VYY-1554EV01 Internal Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 3 of 4 Product: Connector Mini Bridge FCC ID: VYY-1554EV01 Antenna for 433.92MHz Internal Photos Documentation Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Page 4 of 4 Product: Connector Mini Bridge FCC ID: VYY-1554EV01 Antenna for Wi-Fi and BLE module

Report No: 709502230034-00B EMC_SHA_F_R_02.06E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 1 of 2 Rev. 171.00 RF Exposure Estimation 1. Introduction Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Address: No.168 Shengguang Road, Luotuo, Zhenhai, Ningbo ZHEJIANG,China Product: Connector Mini Bridge FCC ID: VYY1554EV01 Model No.: DD1554E Reference RF report # 709502230034-00A 2. B.2 Blanket 1 mW Blanket Exemption According to KDB 447498 D04,The 1 mW Blanket Exemption of § 1.1307(b)(3)(i)(A) applies for single fixed, mobile, and portable RF sources with available maximum time-averaged power of no more than 1 mW, regardless of separation distance. The 1 mW blanket exemption applies at separation distances less than 0.5 cm, including where there is no separation. This exemption shall not be used in conjunction with other exemption criteria other than those for multiple RF sources in paragraph § 1.1307(b)(3)(ii)(A). The 1 mW exemption is independent of service type and covers the full range of 100 kHz to 100 GHz, but it shall not be used in conjunction with other exemption criteria or in devices with higher-power transmitters operating in the same time-averaging period. Exposure from such higher-power transmitters would invalidate the underlying assumption that exposure from the lower-power transmitter is the only contributor to SAR in the relevant volume of tissue. 3. RF Exposure Evaluation Per the test report included herein, for 433.92MHz According to C63.10 Annex G EIRP = pt × gt =( E × d) 2 /30, so pt=( E × d) 2 /30* gt where pt is the transmitter output power in watts gt is the numeric gain of the transmitting antenna (dimensionless) E is the electric field strength in V/m d is the measurement distance in meters (m) transmitter output power for 433.92MHz Function Field strength (E): 67.55 (dBuV/m) = 0.0024(V/m) Measurement distance (D): 3 (m) Antenna Gain, typical (dBi): 0.79 Numerical gain of the transmit antenna (gt): 1.20 Transmitter output power (TP): 0.000001(W) Transmitter output power (TP): 0.001(mW) Report No: 709502230034-00B EMC_SHA_F_R_02.06E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 2 of 2 Rev. 171.00 We used the maximum ERP/EIRP to perform RF exposure exemption evaluation. Evaluation method Exempt Limit (mW) Verdict ◼ Blanket 1 mW Blanket Exemption 1mW Yes  MPE-based Exemption (ERP) 7mW (ERP) N/A  SAR-based Exemption (Pth) 3060mW N/A According to KDB 447498 D04 v01 Appendix E, the simultaneous transmission SAR test exemption should be addressed. Estimated SAR shall be used to determine simultaneous transmission SAR test exemption. SAR est =1.6 ∙ P ant / P th [W/kg]. Where P ant is maximum time-average power or ERP, whichever is greater. P th is defined as in Formula (B.2) ERP 20cm =2040f=2040*0.43392=885.196mW (0.3GHz≤f<1.5GHz) (B.1) P th (mW) = ERP 20cm (d / 20) X (for distance d ≤ 20cm) (B.2) Where X=-log ( 60 퐸푅푃20푐푚 √ 푓 ) 433.92MHz: P th (mW)= 885.196*(0.5/20) -log( 60 885.196 √ 0.43392 ) =23.82mW SAR est =1.6*0.001/23.82=0.00006717 W/kg Note: The Wi-Fi and Bluetooth modules have been certified by C2PC.(Date of Grant:07/06/2023) The change is: RF exposure is evaluated under portable condition. The highest reported SAR for stand-alone transmission exposure conditions is 0.23 W/kg, respectively. According to KDB 447498 D04 v01 clause 2.2.3, This ratio is defined as SPLSR = (SAR1 + SAR2) 1.5 /Ri, where SAR1 and SAR2 are the highest reported SAR or estimated SAR [Glossary] values for the two sources in the pair i, and Ri is their distance in millimeters. When SPLSR ≤ 0.04 (rounded to two decimal digits), for all antenna pairs in the configuration, then the device qualifies for 1-g SAR test exemption. So, SPLSR = (SAR1 + SAR2) 1.5 /Ri =(0.00006717+0.23) 1.5 /15=0.0073 less than 0.04 and the device qualifies for 1-g SAR test exemption. - TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch Reviewed by: Prepared by: Tested by: _____________________ _____________________ ______________________ Hui TONG Jiaxi XU Wang Yiquan EMC Section Manager EMC Project Engineer EMC Test Engineer Date: July 20, 2023 Date: July 20, 2023 Date: July 20, 2023 -------------------------------------------------------End of Test Report--------------------------------------------------------------------

Report Number: 709502230034-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 1 of 20 Rev. 171.00 FCC/ISED TEST REPORT Report Number : 709502230034-00 Date of Issue: June.28, 2023 Model : DD1554E Product Type : Connector Mini Bridge Applicant : NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Address : No.168 Shengguang Road, Luotuo, Zhenhai, Ningbo ZHEJIANG,China Production Facility : NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Address : No.168 Shengguang Road, Luotuo, Zhenhai, Ningbo ZHEJIANG,China Test Result : ◼ Positive  Negative Total pages including Appendices : 20 TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch is a subcontractor to TÜV SÜD Product Service GmbH according to the principles outlined in ISO 17025. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch reports apply only to the specific samples tested under stated test conditions. Construction of the actual test samples has been documented. It is the manufacturer's responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. The manufacturer/importer is responsible to the Competent Authorities in Europe for any modifications made to the production units which result in non-compliance to the relevant regulations. TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch shall have no liability for any deductions, inferences or generalizations drawn by the client or others from TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch issued reports. This report is the confidential property of the client. As a mutual protection to our clients, the public and ourselves, extracts from the test report shall not be reproduced except in full without our written approval. dc Report Number: 709502230034-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 2 of 20 Rev. 171.00 1 Table of Contents 1 Table of Contents ................................................................................................................................................................... 2 2 Details about the Test Laboratory .......................................................................................................................................... 3 3 Description of the Equipment Under Test ............................................................................................................................. 4 4 Summary of Test Standards ................................................................................................................................................... 6 5 Summary of Test Results ....................................................................................................................................................... 7 6 General Remarks .................................................................................................................................................................... 8 7 Systems test configuration ..................................................................................................................................................... 9 8 Test Setups ........................................................................................................................................................................... 10 9 Test Methodology ................................................................................................................................................................ 11 9.1 Conducted Emission.................................................................................................................................................... 11 9.2 Radiated Emission ....................................................................................................................................................... 14 9.3 Bandwidth Measurement ............................................................................................................................................ 17 9.4 Deactivation Time ....................................................................................................................................................... 18 10 Test Equipment List ............................................................................................................................................................. 19 11 System Measurement Uncertainty ....................................................................................................................................... 20 Report Number: 709502230034-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 3 of 20 Rev. 171.00 2 Details about the Test Laboratory Details about the Test Laboratory Test Site 1 Company name: TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch No.16 Lane, 1951 Du Hui Road, Shanghai 201108, P.R. China Test Firm FCC Registration Number: Designation number: 820234 CN1183 IC Company Number: CAB identifier: 25988 CN0101 Telephone: +86 21 6141 0123 Fax: +86 21 6140 8600 Report Number: 709502230034-00 EMC_SHA_F_R_02.05E TÜV SÜD Certification and Testing (China) Co., Ltd. Shanghai Branch 3-13, No.151, Heng Tong Road, Shanghai, 200070, P.R. China Phone: +86 21 61410123, Fax:+86 21 61408600 Page 4 of 20 Rev. 171.00 3 Description of the Equipment Under Test Product: Connector Mini Bridge Model no./HVIN/PMN: DD1554E FCC ID: VYY1554EV01 Rating: USB DC5V(type A) RF Transmission Frequency: 802.11b/g/n(HT20): 2412~2462…

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Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Product: Connector Mini Bridge FCC ID: VYY1554EV01 ©2023 Not to be reproduced, except in its entirety, Page 1 of 2 without the Permission of TÜ V SÜ D Certification and Testing (China) Co., Ltd. Shanghai Branch PHOTOGRAPHS OF TEST SET UP Field Strength and Harmonics Test Setup Radiated Emission Setup 30MHz ~ 1GHz 1GHz ~ 4.5GHz Applicant: NINGBO DOOYA MECHANIC & ELECTRONIC TECHNOLOGY CO., LTD. Product: Connector Mini Bridge FCC ID: VYY1554EV01 ©2023 Not to be reproduced, except in its entirety, Page 2 of 2 without the Permission of TÜ V SÜ D Certification and Testing (China) Co., Ltd. Shanghai Branch Conducted emission Test Setup