2A2X3ERECG Recorder

1 ECGRecorder InstructionManual ProductModel:YK-ER6 Dateofpreparation:July2025 Version:V1.0 2 Tableofcontents 1.Security..............................................................................................................4 1.1SecurityInformation.........................................................................................4 1.2SymbolIntroduction.........................................................................................6 2.ProductIntroduction..........................................................................................7 2.1ScopeofApplication.........................................................................................7 2.2Contraindications..............................................................................................7 2.3StructuralComposition.....................................................................................8 2.4ProductIllustration............................................................................................8 3.InstructionsforUse...........................................................................................8 3.1UnpackingInspection........................................................................................8 3.2DownloadandinstalltheAPP..........................................................................9 3.3APPSoftwareOperatingEnvironment...........................................................10 3.4APPSoftwareUsageRestrictions...................................................................10 3.5Maximumconcurrency:..................................................................................10 3.6TestMethod.....................................................................................................10 3.6.1Six-leadmeasurementposture.........................................................................................11 3.6.2Single-leadmeasurementposture....................................................................................11 3.7SoftwareOperation.........................................................................................13 3.7.1RegistrationandLogin.....................................................................................................13 3.7.2AddingDevice..................................................................................................................13 3.7.3EquipmentSetup..............................................................................................................14 3.7.4MeasurementRecord........................................................................................................15 3.7.5PageSearch......................................................................................................................17 3.7.6DeviceRemoval...............................................................................................................17 3.7.7PersonalInformationSettings..........................................................................................18 3.7.8UserFeedback..................................................................................................................18 3.7.9AboutUs...........................................................................................................................19 3.7.10AccountCancellation.....................................................................................................20 3.7.11ChangePassword...........................................................................................................20 3.7.12OTGdataupload............................................................................错误！未定义书签。 3 4. Regardingcharging.........................................................................................20 5.Maintenanceandupkeep.................................................................................21 5.1Maintenance....................................................................................................21 5.1.1Dailycleaninganddisinfection........................................................................................21 5.1.2RoutineInspection............................................................................................................21 5.1.3Repair................................................................................................................................22 5.2CommonFaultsandSolutions........................................................................22 6.Electromagneticcompatibility........................................................................22 7.Annex..............................................................................................................27 7.1ProductList.....................................................................................................27 8.24-hourafter-salesservice27 4 1. Safety 1.1SecurityInformation Thisinstructionmanualdescribesthepurpose,functions,andsafeoperating proceduresofthedevice.Beforeusingthisdevice,pleasereadandfully understandthecontentsofthisinstructionmanualtoensurethatyoucanusethe devicecorrectlyandensurethesafetyofthepatientandtheoperator. Notice 1.WhenBluetoothisdisconnected,theapplicationcannotconnecttotheECGmonitoring deviceviaBluetoothtoviewtheECG. 2.WhentheECGmonitoringdeviceleadsbecomedetached,theapplicationwilldisplayalead detachmentnotification. 3.Thisproductisnotsuitableforuserswithdisabilitiesorthosewhohavelanguagedifferences. 4.Usersmayencounterthefollowingcriticaldefects:softwarecrashesandserverdowntime.If youencountertheabovesituationsandcannotrecoveronyourown,pleasecontactan engineerforassistance. 5.Theresultsofanelectrocardiogram(ECG)diagnosismaydifferfromthoseofthedoctor.The doctorcanmaketheirownjudgmentbasedontheirECGexpertiseandpastexperience. 6.Pleaseusethematchingelectrocardiogram(ECG)acquisitiondevice.Theacquisitiondevice mustbeabletoprovidedatathatconformstothedatainterfacestandardofthisproduct. 7.Heartratecalcul…

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Xuzhou Yongkang Electronic Science Technology Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company Name: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder FCC ID: 2A2X3ER Model(s):YK-ER6, YK-ER1,YK-ER2,YK-ER3 FRN: 0031293947 2.911(d)(5)(i) Equipment Type We, [Xuzhou Yongkang Electronic Science Technology Co., Ltd.] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Qiu Zhaohao Date: 2026.03.13 Title and Company name: Research and Development Manager / Xuzhou Yongkang Electronic Science Technology Co., Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Xuzhou Yongkang Electronic Science Technology Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company Name: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder FCC ID: 2A2X3ER Model(s):YK-ER6, YK-ER1,YK-ER2,YK-ER3 FRN: 0031293947 2.911(d)(5)(ii) Applicant filing We, [Xuzhou Yongkang Electronic Science Technology Co., Ltd.] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Qiu Zhaohao Date: 2026.03.13 Title and Company name: Research and Development Manager / Xuzhou Yongkang Electronic Science Technology Co., Ltd. NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

AOGES CO., LIMITED 2.911 (d)(7)USA Agent v1.5 Section 2.911(d)(7) USA Agent for Service of Process Company Name: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder FCC ID: 2A2X3ER Model(s):YK-ER6, YK-ER1,YK-ER2,YK-ER3 2.911(d)(7) USA Designated Agent for Service of Process We, [Xuzhou Yongkang Electronic Science Technology Co., Ltd.] (“the applicant”) designate [AOGES CO., LIMITED] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either we the grantee have permanently terminated all marketing and importation of the applicable equipment within the U.S., or at the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or at the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: AOGES CO., LIMITED USA Address: 1624 Market St, Ste 226, #30327 Denver CO, 80202 USA FRN Number：0033947847 Contact Name: XIAOYAN LAl Telephone No: +1 303 623 1940 Email: [email protected] Applicant Company name: Xuzhou Yongkang Electronic Science Technology Co., Ltd.. Address: LIANDO U Valley, No.6 Leye Road ,Xuzhou ETDZ, Xuzhou, China Grantee FRN Number：0031293947 FCC Grantee Code: 2A2X3 Contact Name: Qiu Zhaohao Telephone No: 15062149600 Email: [email protected] AOGES CO., LIMITED 2.911 (d)(7)USA Agent v1.5 Signature: Title: CEO Signature: Title: CEO Date: 2026.03.13 Date: 2026.03.13 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Xuzhou Yongkang Electronic Science Technology Co., Ltd. Agent Authorization Company Name: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder FCC ID: 2A2X3ER Model(s):YK-ER6, YK-ER1,YK-ER2,YK-ER3 Product Description: ECG Recorder We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2026.03.13 Name: Jiankuai Li Title: PM Company: Shenzhen STS Test Services Co., Ltd.

Xuzhou Yongkang Electronic Science Technology Co., Ltd. Authorization Letter We, (the approval holder) Company name Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China declare that the following representative (agent): Name (person) Bovey Yang Company name SHENZHEN STS TEST SERVICES CO.,LTD. Addresss 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub- District, Bao’an District, Shenzhen, Guang Dong, China City Shenzhen Country China to act on our behalf on all matters concerning the application and documents submitted to Nemko for product certification below Product Description ECG Recorder Type or Model(s) 2A2X3ER Brand Name N/A FCC ID 2A2X3ER Attestation: Signature: Date: 2026.03.13 Name: Jiankuai Li Title: PM Company: Shenzhen STS Test Services Co., Ltd.

2025.09.19 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize SHENZHEN STS TEST SERVICES CO.,LTD./ A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District,Bao’an District, Shenzhen, Guang Dong, China/Jiankuai Li(Name of Agent company name and address, Name of Agent) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. This appointment is valid until further December 31, 2026. Name: Jiankuai Li Title: PM E-mail:[email protected] Name: Qiu Zhaohao Title: Manager E-mail: [email protected] Company: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Signature:

Differences Description We Xuzhou Yongkang Electronic Science Technology Co., Ltd. state: Product： ECG Recorder Model Name： YK-ER6, YK-ER1,YK-ER2,YK-ER3 Trade Name: N/A FCC ID: 2A2X3ER The appearance color is different, the motherboard, circuit, frequency, and RF module are all the same. Signatory Date 2026.03.13 Signature Name: Qiu Zhaohao Title: Research and Development Manager Company: Xuzhou Yongkang Electronic Science Technology Co., Ltd. Address: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China

Xuzhou Yongkang Electronic Science Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2026.03.13 Subject; Request for Confidentiality FCC ID: 2A2X3ER To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Operational Description Tune-up Procedure SOFTWARE SECURITY REQUIREMENTS FOR U-NII DEVICES In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jiankuai Li Title: PM

Page 1 of 3 Report No.: STS2601049 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: YK-ER3 Photo 1 Photo 2 Page 2 of 3 Report No.: STS2601049 Photo 3 Photo 4 Page 3 of 3 Report No.: STS2601049 Photo 5 Photo 6

Label Model: YK-ER6 FCC ID: 2A2X3ER 20mm 5mm

Page 1 of 3 Report No.: STS2601049 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: YK-ER3 Photo 1 Photo 2 BLE Antenna Page 2 of 3 Report No.: STS2601049 Photo 3 Photo 4 Page 3 of 3 Report No.: STS2601049 Photo 5 Photo 6

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. MPE Report Report No.:STS2601049H01 Issued for Xuzhou Yongkang Electronic Science Technology Co.,Ltd. 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder Brand Name: Yonker Model Name: YK-ER6 Series Model(s): YK-ER1,YK-ER2,YK-ER3 FCC ID: 2A2X3ER Test Standards: FCC 47CFR §2.1093 Page 2 of 9 Report No.: STS2601049H01 TEST REPORT Applicant’s Name ................. : Xuzhou Yongkang Electronic Science Technology Co.,Ltd. Address .................................. : 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Manufacturer's Name .......... : Xuzhou Yongkang Electronic Science Technology Co.,Ltd. Address .................................. : 2nd & 3rd floor of Building No. 5, Block B,Huaihai Biomedical Industry Park, No. 5 Tengzhai North Road, Xuzhou High-tech, Industrial Development Zone, 221000 Xuzhou, PEOPLE'S REPUBLIC OF CHINA Product Description Product Name ........................ : ECG Recorder Brand Name ........................... : Yonker Model Name........................... : YK-ER6 Series Model(s) ...................... : YK-ER1,YK-ER2,YK-ER3 Test Standards ..................... : FCC 47CFR §2.1093 447498 D04 Interim General RF Exposure Guidance v01 The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 07 Jan. 2026 Date (s) of performance of tests.............. : 07 Jan. 2026~04 Mar. 2026 Date of Issue ........................................... : 04 Mar. 2026 Test Result ............................................... : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 9 Report No.: STS2601049H01 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1093 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 9 Page 4 of 9 Report No.: STS2601049H01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 04 Mar. 2026 STS2601049H01 ALL Initial Issue Page 5 of 9 Report No.: STS2601049H01 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name ECG Recorder Brand Name Yonker Model Name YK-ER6 Series Model(s) YK-ER1,YK-ER2,YK-ER3 Model Difference The appearance color is different, the motherboard, circuit, frequency, and RF module are all the same Product Description The EUT is ECG Recorder Operation Frequency: 2402~2480 MHz Modulation Type: GFSK Antenna gain: 5.05 dBi Antenna Designation: FPC Power Rating Input: DC 5V 2A Adapter Model: LXCP12S-050200DW Input: 100-240V~50/60Hz 0.5A Output: 5V-2A Battery Model: 502040 Rated Voltage: 3.7 V Capacity: 400 mAh Hardware Version V1.0.0 Software Version V1.0 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 6 of 9 Report No.: STS2601049H01 2. FCC 47CFR §2.1093 REQUIREMENT 2.1 TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. 2.2 LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: Page 7 of 9 Report No.: STS2601049H01 (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). RF Source frequency (MHz) Threshold ERP(watts) 0.3-1.34 1,920 R 2 . 1.34-30 3,450 R 2 /f 2 . 30-300 3.83 R 2 . 300-1,500 0.0128 R 2 f. 1,500-100,000 19.2R 2 . Page 8 of 9 Report No.: STS2601049H01 For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure o…

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内容 页数页码 NO. （ Number （ Page （ Contents ） ofPage ） Code ） 1 承认书封面（SpecCover） 11 2 承认书项目表（SpecItem） 12 3 工程成品图（ Drawing ） 13 4 电性测试报告（TestReports） 14 5 S 参数测试（ SParameter ） 15 6 增益测试（GainTest） 16 7 8 9 10 --- 11--- 12--- FPC Antenna Specification Dongguan Chuangjie Electronics Co., Ltd. Model: MX24G3511-113B-130LX TestReports ElectricalProperties Frequency Impedance500hmNominal V.S.W.R1.92:1Max ReturnLoss-10dBMax RadiationOmni-directional Gain(Peak)5.05dBi CableLoss3.2dB/mMax@2450MHz PolarizationLinear,Vertical AdmittedPower1W Connectoripex PhysicalProperties AntennaMaterialFPCB Cable TypeO.D.1.13mm//060mm OperatingTemp.-10~+60 ̊C StorageTemp. -10~+70 ̊C CableColorBlack 2.4g5g5.8g Dongguan Chuangjie Electronics Co., Ltd. D E S C R I P T I O N S I G N D A T E A P P R O V E R D C B Y D 2 0 1 4 - 0 3 - 1 8 S C A L E : 1 / 1 U N I T S : m m R E V I S I O N : A A P P R O V E D B Y T o l e r a n c e T I T L E : 2 . 4 G A N T E N N A P A R T N O . : M X 2 4 G 3 5 1 1 - 1 1 3 B - 1 3 0 L X D W G N A M E : C H E C K E D B Y D E S I D N E D B Y ± 3 ° X ° X . X ± 0 . 2 0 X . X X ± 0 . 1 0 F P C 3 5 * 1 1 * 0 . 3 m m O . D . 1 . 1 3 m m B l a c k I P E X P a r t N u m b e r N a m e M X 3 5 1 1 P X - A 0 1 F P C R - C B - 1 1 3 B C o a x i a l C a b l e C o n n e c t o r C I - 1 1 3 1 N o . 2 3 1 1 Q ' t y 1 M a t e r i a l l e o n 2 0 1 4 - 0 3 - 1 8 j e f f 2 0 1 4 - 0 3 - 1 8 ＊ 6 0 SParameterTest AgilentE5071C Dongguan Chuangjie Electronics Co., Ltd. GainTest Antenna Radiation Pattern VS Gain Dongguan Chuangjie Electronics Co., Ltd.

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2601049W01 Issued for Xuzhou Yongkang Electronic Science Technology Co.,Ltd. 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Product Name: ECG Recorder Brand Name: Yonker Model Name: YK-ER6 Series Model(s): YK-ER1,YK-ER2,YK-ER3 FCC ID: 2A2X3ER Test Standards: FCC Part15.247 Page 2 of 71 Report No.: STS2601049W01 TEST REPORT Applicant’s Name ..................: Xuzhou Yongkang Electronic Science Technology Co.,Ltd. Address ..................................: 2&3rd Floor, Block B, Huaihai Biomedical Industry Park, No. 5 Tengzhai North Rd.,Xuzhou,China Manufacturer's Name ...........: Xuzhou Yongkang Electronic Science Technology Co.,Ltd. Address ..................................: 2nd & 3rd floor of Building No. 5, Block B,Huaihai Biomedical Industry Park, No. 5 Tengzhai North Road, Xuzhou High-tech, Industrial Development Zone, 221000 Xuzhou, PEOPLE'S REPUBLIC OF CHINA Product Description Product Name .........................: ECG Recorder Brand Name ...........................: Yonker Model Name ...........................:... : YK-ER6 Series Model(s) .....................: YK-ER1,YK-ER2,YK-ER3 Test Standards ......................: FCC Part15.247 Test Procedure .......................: ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the IC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 07 Jan. 2026 Date (s) of performance of tests ............. : 07 Jan. 2026~04 Mar. 2026 Date of Issue ........................................... : 04 Mar. 2026 Test Result ............................................... : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 71 Report No.: STS2601049W01 Table of Contents Page 1. SUMMARY OF TEST RESULTS 7 1.1 TEST FACTORY 8 1.2 MEASUREMENT UNCERTAINTY 8 2. GENERAL INFORMATION 9 2.1 GENERAL DESCRIPTION OF THE EUT 9 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 11 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 12 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 13 2.6 EQUIPMENTS LIST 14 3. EMC EMISSION TEST 15 3.1 CONDUCTED EMISSION MEASUREMENT 15 3.2 TEST PROCEDURE 16 3.3 TEST SETUP 16 3.4 EUT OPERATING CONDITIONS 16 3.5 TEST RESULTS 17 4. RADIATED EMISSION MEASUREMENT 19 4.1 RADIATED EMISSION LIMITS 19 4.2 TEST PROCEDURE 21 4.3 TEST SETUP 22 4.4 EUT OPERATING CONDITIONS 23 4.5 FIELD STRENGTH CALCULATION 23 4.6 TEST RESULTS 24 5. DUTY CYCLE 37 5.1 TEST STANDARD 37 5.2 TEST PROCEDURE 37 5.3 DEVIATION FROM STANDARD 37 5.4 TEST SETUP 37 5.6 TEST RESULTS 37 6. CONDUCTED SPURIOUS & BAND EDGE EMISSION 38 6.1 LIMIT 38 6.2 TEST PROCEDURE 38 Page 4 of 71 Report No.: STS2601049W01 Table of Contents Page 6.3 TEST SETUP 38 6.4 EUT OPERATION CONDITIONS 38 6.5 TEST RESULTS 38 7. POWER SPECTRAL DENSITY TEST 39 7.1 LIMIT 39 7.2 TEST PROCEDURE 39 7.3 TEST SETUP 39 7.4 EUT OPERATION CONDITIONS 39 7.5 TEST RESULTS 39 8. BANDWIDTH TEST 40 8.1 LIMIT 40 8.2 TEST PROCEDURE 40 8.3 TEST SETUP 40 8.4 EUT OPERATION CONDITIONS 40 8.5 TEST RESULTS 40 9. PEAK OUTPUT POWER TEST 41 9.1 LIMIT 41 9.2 TEST PROCEDURE 41 9.3 TEST SETUP 41 9.4 EUT OPERATION CONDITIONS 41 9.5 TEST RESULTS 41 10. ANTENNA REQUIREMENT 42 10.1 STANDARD REQUIREMENT 42 10.2 EUT ANTENNA 42 APPENDIX 1-TEST DATA 43 DUTY CYCLE 43 MAXIMUM PEAK CONDUCTED OUTPUT POWER 47 -6DB BANDWIDTH 51 MAXIMUM POWER SPECTRAL DENSITY LEVEL 55 BAND EDGE 59 CONDUCTED RF SPURIOUS EMISSION 64 Page 5 of 71 Report No.: STS2601049W01 Table of Contents Page APPENDIX 2- EUT TEST PHOTO 71 Page 6 of 71 Report No.: STS2601049W01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 04 Mar. 2026 STS2601049W01 ALL Initial Issue Page 7 of 71 Report No.: STS2601049W01 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- Note: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Page 8 of 71 Report No.: STS2601049W01 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Sc…

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