2AD56HLK-B50Bluetooth module

Shenzhen Hi-Link Electronic co., Ltd. Address: 1705, 1706, 1709A, Building E, Xinghe WORLD, Minle Community, Minzhi Street, Longhua District, Shenzhen, China Tel.: (86) 755-23152658 Fax: (86) 755-83575196 E-mail: [email protected] Date: 2023-09-14 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attestation letter Dear Sir or Madam, We, Shenzhen Hi-Link Electronic co., Ltd., declare that our Product Name: Bluetooth Module; Model: HLK-B50; FCC ID: 2AD56HLK-B50, which chip (Model: FR5082DM) supports BDR/EDR/BLE 1M, for marketing purpose, other functions have been shielded by manufacturer though software and the end user can not have the capability to activate those functions. Sincerely, Signature: Name: Jacky Gong Title: Manager

ATTESTATION STATEMENT Shenzhen Hi-Link Electronic co., Ltd. Address: 1705, 1706, 1709A, Building E, Xinghe WORLD, Minle Community, Minzhi Street, Longhua District, Shenzhen, China Tel.: (86) 755-23152658 Fax: (86) 755-83575196 E-mail: [email protected] Date: 2023-09-04 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements Part 2.911(d)(5)(i), (ii) Filing FCC ID: 2AD56HLK-B50 Shenzhen Hi-Link Electronic 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. And Shenzhen Hi-Link Electronic 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. Sincerely, Sighed by: Jacky Gong Title: Manager

Shenzhen Hi-Link Electronic co., Ltd. Address: 1705, 1706, 1709A, Building E, Xinghe WORLD, Minle Community, Minzhi Street, Longhua District, Shenzhen, China Tel.: (86) 755-23152658 Fax: (86) 755-83575196 E-mail: [email protected] FCC Authorization Date: 2023-09-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, Shenzhen Hi-Link Electronic co., Ltd. hereby authorize China Certification ICT Co., Ltd (Dongguan) 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 China Certification ICT Co., Ltd (Dongguan) on our behalf shall have the same effect as our own action. We, Shenzhen Hi-Link Electronic co., Ltd. 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. Sincerely Yours, Signature Name: Jacky Gong Title: Manager QA-FR-170-B

Shenzhen Hi-Link Electronic co., Ltd. Address: 1705, 1706, 1709A, Building E, Xinghe WORLD, Minle Community, Minzhi Street, Longhua District, Shenzhen, China Tel.: (86) 755-23152658 Fax: (86) 755-83575196 E-mail: [email protected] Modular Approval L etter Date: 2023-09-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Application Examiner, We, Shenzhen Hi-Link Electronic co., Ltd. is submitting this application for certification of product named as Product Name: Product Name: Bluetooth Module; Model: HLK-B50; FCC ID: 2AD56HLK-B50. It is seeking modular approval. The radio meets the requirements for modular approval as detailed in FCC 15.247. Compliance to each of the requirements is described below: 1. “The modular transmitter must have its own RF shielding.” Yes, it is fulfilled. The radio portion of the module has its own RF shielding. The shielding is installed at the factory. Please see the EUT photos. 2. “The modular transmitter must have buffered modulation/data inputs.” The modular transmitter has buffered modulation/data inputs, Buffered data inputsstage has been integrated in chip (Model: FR5082DM). 3. “The modular transmitter must have its own power supply regulation.” Yes, it is fulfilled. The EUT has its own power supply regulation to insure compliance, please refer to the Block Diagram 4. “The modular transmitter must comply with the antenna requirements of Section 15.247” Yes. The EUT has a unique antenna port arrangement for Bluetooth Module, which was employed the antenna maximum gain is 2.5 dBi. 5. “The modular transmitter must be tested in a stand-alone configuration.” Yes, it is fulfilled. The EUT was tested in a stand-alone configuration, please refer to test photos exhibit for details. 6. “The modular transmitter must be labeled with its own FCC ID number.” Yes, it is fulfilled. The module will be labeled with its own FCC ID number. Please see FCC ID label & location exhibit. 7. “The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements.” Yes, it is fulfilled. The necessary explanation to be complied with this requirement is contained in the user manual, and please refers to the User manual. 8. “The modular transmitter must comply with any applicable RF exposure requirements.” This equipment complies with FCC radiation exposure limits set forth for uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. If the device built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by§2.1093. Please contact me if you have additional questions. Your attention to this matter is greatly appreciated. Sincerely Yours, Signature: Name: Jacky Gong Title: Manager

China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-EXP EUT EXTERNAL PHOTOGRAPHS China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-EXP Antenna

China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-RF EXHIBITA‐FCC ID LABEL AND LOCATION FCC ID Label The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the time purchase (Labeling requirements per 2.295)

China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-INP EUT INTERNAL PHOTOGRAPHS Antenna

China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-00A Page 39 of 41 5. RF EXPOSURE EVALUATION 5.1 MAXIMUM PERMISSIBLE EXPOSURE (MPE) 5.1.1 Applicable Standard FCC §15.247 (i) & §1.1310 & §2.1091 Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess of the Commission's guidelines. See §1.1307(b)(1) of this chapter. Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091) (B) 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/f²) 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; According to §1.1310 and §2.1091 RF exposure is calculated. 5.1.2 Procedure Prediction of power density at the distance of the applicable MPE limit S = PG/4R² = 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); 5.1.3 Calculated Result Operation Bands Frequency (MHz) Antenna Gain Conducted output power including Tune- up Tolerance Evaluation Distance (cm) Power Density (mW/cm 2 ) MPE Limit (mW/cm 2 ) (dBi) (numeric)(dBm)(mW) BLE 2402-2480 2.50 1.77811.26200.0004 1 BT 3.0 2402-2480 2.50 1.77842.51200.001 1 Note: The Value of Maximum Conducted Power including Tune-up Tolerance was declared by the customer. Result: The device meets FCC MPE at 20 cm distance.

HLK-B50 HLK-B50 antenna specification 1.Overview The PCB antenna is an onboard antenna designed according to the size of HLK-B50. Figure 1: HLK-B50 onboard antenna 2.Basic parameters: Parameter Index Notes Frequency Range(MHz) 2400-2500 Gain(dBi) 2.5dBi V.S.W.R. ＜1.5 Polarization Vertical Non-Circularity(dB) ±0.5 Impedance(Ω) 50 Lightning Protection Direct Ground Maximum Input Power(W) 50 Operating Temperature(°C) -40~+70 Reposition Temperature(°C) -55~+80 1 HLK-B50 3.return loss（S11/VSWR） 2.4GHz 2.45GHz 2.5GHz S11（dB） -10.1 -28 -10.7 VSWR 1.9 1.1 1.9 2 HLK-B50 4.Radiation mode（2.45GHz） X-Y plane X-Y plane X-Y plane Avg gain(dBi) -3.5 -0.36 -1.76 Peak gain(dBi) 2.08 2.50 1.46 3 Manufacturer: Jiangmen Hecheng Electronics Co., LTD Room 601, 6th Floor, Building 1, 268 Qinglan Road, Jianghai District, Jiangmen City

TEST REPORT Applicant: Shenzhen Hi-Link Electronic Co., Ltd. Address: 1705, 1706, 1709A, Building E, Xinghe WORLD, Minle Community, Minzhi Street, Longhua District, Shenzhen, China FCC ID: 2AD56HLK-B50 Product Name: Bluetooth Module Standard(s): 47 CFR Part 15, Subpart C (15.247) ANSI C63.10-2013 KDB 558074 D01 15.247 Meas Guidance v05r02 The above equipment has been tested and found compliant with the requirement of the relative standards by China Certification ICT Co., Ltd (Dongguan) Report Number: CR230845434-00A Date Of Issue: 2023/9/4 Reviewed By: Calvin Chen Title: RF Engineer Approved By: Sun Zhong Title: Manager Test Laboratory: China Certification ICT Co., Ltd (Dongguan) No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China Tel: +86-769-82016888 China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-00A Page 2 of 41 Test Facility The Test site used by China Certification ICT Co., Ltd (Dongguan) to collect test data is located on the No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China. The lab has been recognized as the FCC accredited lab under the KDB 974614 D01 and is listed in the FCC Public Access Link (PAL) database, FCC Registration No. : 442868, the FCC Designation No. : CN1314. The lab has been recognized by Innovation, Science and Economic Development Canada to test to Canadian radio equipment requirements, the CAB identifier: CN0123. Declarations China Certification ICT Co., Ltd (Dongguan) is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with a triangle symbol “▲”. Customer model name, addresses, names, trademarks etc. are not considered data. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report cannot be reproduced except in full, without prior written approval of the Company. 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. This report may contain data that are not covered by the accreditation scope and shall be marked with an asterisk “★”. China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-00A Page 3 of 41 CONTENTS T EST FACILITY .......................................................................................................................................... 2 DECLARATIONS .......................................................................................................................................... 2 DOCUMENT REVISION HISTORY .......................................................................................... 5 1. GENERAL INFORMATION .................................................................................................... 6 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ....................................................... 6 1.2 DESCRIPTION OF TEST CONFIGURATION ........................................................................................... 7 1.2.1 EUT Operation Condition: ............................................................................................................................. 7 1.2.2 Support Equipment List and Details .............................................................................................................. 7 1.2.3 Support Cable List and Details ...................................................................................................................... 7 1.2.4 Block Diagram of Test Setup ......................................................................................................................... 7 1.3 MEASUREMENT UNCERTAINTY .......................................................................................................... 8 2. SUMMARY OF TEST RESULTS ............................................................................................ 9 3. REQUIREMENTS AND TEST PROCEDURES .................................................................. 10 3.1 AC LINE CONDUCTED EMISSIONS .................................................................................................... 10 3.1.1 Applicable Standard ..................................................................................................................................... 10 3.1.2 EUT Setup.................................................................................................................................................... 11 3.1.3 EMI Test Receiver Setup ............................................................................................................................. 11 3.1.4 Test Procedure ............................................................................................................................................. 12 3.1.5 Corrected Amplitude & Margin Calculation ................................................................................................ 12 3.2 RADIATION SPURIOUS EMISSIONS .................................................................................................... 13 3.2.1 Applicable Standard ..................................................................................................................................... 13 3.2.2 EUT Setup.................................................................................................................................................... 13 3.2.3 EMI Test Receiver & Spectrum Analyzer Setup ......................................................................................... 14 3.2.4 Test Procedure ............................................................................................................................................. 14 3.2.5 Corrected Amplitude & Margin Calculation ................................................................................................ 14 3.3 MINIMUM 6 DB BANDWIDTH ..................................…

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China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-00A-TSP TEST SETUP PHOTOGRAPHS Conducted Emissions Front View Conducted Emissions Side View China Certification ICT Co., Ltd (Dongguan) Report No.: CR230845434-00A-TSP Radiated Emission Below 1GHz View Radiated Emission Above 1GHz View