2A595-YH252LED controller

EU DECLARATION OF CONFORMITY Annex VI of Directive 2014/53/EU of the European Parliament and of the Council 1. For the following Radio equipment: Product name: LED controller Trade name or Brand: N/A Model: YH-252 Software / Hardware number: YH-L68-2.0 / BT4418-V1.1 2.Name and address of the manufacturer or his authorized representative: Manufacturer: Dongguan Yihong Hardware electronics Co., LTD Address: Room 1106, NO.2 Shangheng Road, Chang'an Town Dongguan, Guangdong, 523880 China 3. This declaration of conformity is issued under the sole responsibility of the Manufacturer. 4. Object of the declaration (identification of the radio equipment allowing traceability; it may include a colour image of sufficient clarity where necessary for the identification of the radio equipment): 5. The object of the declaration described above is in conformity with the relevant Union harmonization legislation: Directive 2014/53/EU (RED) 6.References to the relevant harmonised standards used or references to the other technical specifications in relation to which conformity is declared: Article 3.1a Health: EN 62479:2010 Article 3.1a Electrical Safety: EN IEC 62368-1: 2020+A11:2020 Article 3.1b: ETSI EN 301 489-1 V2.2.3 (2019-11) ETSI EN 301 489-17 V3.3.1 (2024-09) Applicant's name: Dongguan Yihong Hardware electronics Co., LTD EN IEC 55015:2019+A11:2020 EN IEC 61547:2023 EN IEC 61000-3-2:2019+A1:2021+A2:2024 EN 61000-3-3:2013+A1:2019+A2:2 Article 3.2: ETSI EN 300 328 V2.2.2 (2019-07) Operating frequency: 2402-2480MHz CE RF Power: -1.64dBm RF exposure warning: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Address: Room 1106,NO.2 Shangheng Road,Chang'an Town Dongguan,Guangdong,523880 China FCC Caution. This device complies with part 15 of the FCC Rules. 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: 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. *RF warning for Portable device: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. IC Statement: The device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device. L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d'Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : 1.L'appareil ne doit pas produire de brouillage; 2.L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. RF exposure statement: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Déclaration d'exposition RF: L'appareil a été évalué pour répondre aux exigences générales d'exposition aux RF. L'appareil peut être utilisé dans des conditions d'exposition portable sans restriction.

DongguanYihongHardwareelectronicsCo.,LTD CoveredEquipmentCertificationAttestationLetter 12/8/2025 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2A595-YH252 DongguanYihongHardwareelectronicsCo.,LTD(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipmentprohibitedfrom receivinganequipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. DongguanYihongHardwareelectronicsCo.,LTD(“theapplicant”)certifiesthat,as ofthedateofthefilingoftheapplication,theapplicantisnotidentifiedontheCovered List(asaspecificallynamedentityoranyofitssubsidiariesoraffiliates)asanentity producing“covered”equipment. DongguanYihongHardwareelectronicsCo.,LTD(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtdoesnotincludecybersecurityoranti-virus softwareproducedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsand assignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886 andKDB986446D01CoveredEquipmentGuidancesectionB(2a). Signed: PrintedName:WenFengZeng Company:DongguanYihongHardwareelectronicsCo.,LTD Date:12/8/2025

DongguanYihongHardwareelectronicsCo.,LTD Date:2025-12-08 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 RE:LETTEROFAGENTAUTHORIZATION FCCID:2A595-YH252 ToWhomItMayConcern: We,theundersigned,herebyauthorizeComplianceTesting,LLCtoactonourbehalfinallmatters relatingtoapplicationforequipmentauthorization,includingthesigningofalldocumentsrelatingto thesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothedenialof benefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21 U.S.C.853(a). Signature PrintedName:WenFengZeng Company:DongguanYihongHardwareelectronicsCo.,LTD Email:[email protected] Telephone:076988499843

DongguanYihongHardwareelectronicsCo.,LTD RequestforLong-TermConfidentialityLetter-FCC Date:2025-12-08 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,Maryland21046 Re:RequestforLong-Termconfidentiality FCCID:2A595-YH252 Towhomitmayconcern, Weherebyrespectfullyrequestthatundertheprovisionof47CFR0.459and0.457(d)the documentslistedbelowandattachedwiththisapplicationforcertificationbeprovidedwithLong- Termconfidentialstatus.  Schematics  BlockDiagrams TheoryofOperation Anyexhibit/informationforwhichwehaverequestedconfidentiality,butwhichmaynotbe accordedsuchtreatmentbytheFCC,shouldbereturnedtous. Thedocumentslistedabovecontaintradesecretsthataretreatedasconfidentialbyus. Substantialcompetitiveharmtouscouldresultshouldtheybemadeavailabletothepublic. Sincerelyyours, Signature PrintedName:WenFengZeng Company:DongguanYihongHardwareelectronicsCo.,LTD Email:[email protected] Telephone:076988499843

LabelandLabelLocation FCCID:2A595-YH252

Page 1 of 2 RF EXPOSURE EVALUATION FCC ID: 2A595-YH252 Product Name : LED controller Model Name : YH-252 Operating frequency : 2402-2480MHz Numbers of Channel : 40 channels For DTS Antenna Type : PCB Antenna Antenna Gain : 0 dBi Type of Modulation : GFSK For DTS Power supply : DC 5V2A Hardware Version : BT4418-V1.1 Software Version : YH-L68-2.0 Page 2 of 2 Standard Requirement According to § 15.247(i) and § 1.1307b(1), 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 KDB 447498 D01 General RF Exposure Guidance v06, section 4. 3. 1. The 1-g and 10-g SAR test exclusion thresholds for 100MHz to 6GHz at test separation distances ≤ 50mm are determined by: [ (max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]*[ √f(GHz)] ≤3.0 for 1-g SAR and ≤7.5 for 10-g SAR extremity SAR, where ⚫ f(GHz) is the RF channel transmit frequency in GHz ⚫ Power and distance are rounded to the nearest mW and mm before calculation ⚫ The result is rounded to one decimal place for comparison. The test exclusions are applicable only when the minimum test separation distance is ≤ 50mm and for transmission frequencies between 100MHz and 6GHz. When the minimum test separation distance is <5mm, a distance of 5mm is applied to determine SAR test exclusion. Routine SAR evaluation refers to that specifically required by § 2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to quality for TCB approval. Channel (MHz) Maximum output power (dBm) Tune up tolerance (dBm) Max Tune Up Power (mW) Distance (mm) Calculation results Limit Operating Mode 2402 -1.35 -1.35±1 0.922571 5 0.285967 3 BLE_2M(2402) According to KDB 447498, The device only support BT function, and no simultaneous SAR measurement is required. Signature Simon Pu Manager Date: 2025-12-15

Page 1 of 65 FCC TEST REPORT FCC ID: 2A595-YH252 Product : LED controller Model Name : YH-252 Brand : N/A Report No. : PTC25110415102E-FC01 Prepared for Dongguan Yihong Hardware electronics Co., LTD Room 1106,NO.2 Shangheng Road,Chang'an Town Dongguan,Guangdong,523880 China Prepared by Precise Testing & Certification Co., Ltd Building 1, No. 6, Tongxin Road, Dongcheng Street, Dongguan, Guangdong, China Report No.: PTC25110415102E-FC01 Page 2 of 65 1 TEST RESULT CERTIFICATION Applicant’s name : Dongguan Yihong Hardware electronics Co., LTD Address : Room 1106,NO.2 Shangheng Road,Chang'an Town Dongguan, Guangdong,523880 China Manufacture's name : Dongguan Yihong Hardware electronics Co., LTD Address : Room 1106,NO.2 Shangheng Road,Chang'an Town Dongguan, Guangdong,523880 China Product name : LED controller Model name : YH-252 Standards : FCC CFR47 Part 15 Section 15.247 Test procedure : ANSI C63.10-2020 Test Date : Nov. 14, 2025 to Nov. 25, 2025 Date of Issue : Dec. 08, 2025 Test Result : Pass This device described above has been tested by PTC, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of PTC, this document may be altered or revised by PTC, personal only, and shall be noted in the revision of the document. Test Engineer: Jack zhou / Engineer Technical Manager: Simon Pu / Manager Report No.: PTC25110415102E-FC01 Page 3 of 65 Contents Page 1 TEST RESULT CERTIFICATION .............................................................................................................................. 2 2 TEST SUMMARY ......................................................................................................................................................... 5 2.1 TEST SITE ........................................................................................................................................................... 6 3 GENERAL INFORMATION ..................................................................................................................................... 7 3.1 GENERAL DESCRIPTION OF E.U.T. .................................................................................................................... 7 3.2 CHANNEL LIST .................................................................................................................................................... 8 4 EQUIPMENT DURING TEST .................................................................................................................................. 9 4.1 EQUIPMENTS LIST ............................................................................................................................................ 9 4.2 MEASUREMENT UNCERTAINTY ......................................................................................................................... 11 4.3 DESCRIPTION OF SUPPORT UNITS ................................................................................................................... 12 5 CONDUCTED EMISSION ......................................................................................................................................... 13 5.1 E.U.T. OPERATION ........................................................................................................................................... 13 5.2 EUT SETUP ...................................................................................................................................................... 13 5.3 TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................................. 14 5.4 MEASUREMENT PROCEDURE ........................................................................................................................... 14 5.5 CONDUCTED EMISSION LIMIT ........................................................................................................................... 14 5.6 MEASUREMENT DESCRIPTION .......................................................................................................................... 14 5.7 CONDUCTED EMISSION TEST RESULT ............................................................................................................. 14 6 RADIATED SPURIOUS EMISSIONS ..................................................................................................................... 17 6.1 EUT OPERATION .............................................................................................................................................. 17 6.2 TEST SETUP ..................................................................................................................................................... 18 6.3 SPECTRUM ANALYZER SETUP .......................................................................................................................... 19 6.4 TEST PROCEDURE ............................................................................................................................................ 20 6.5 SUMMARY OF TEST RESULTS .......................................................................................................................... 22 7 CONDUCT BAND EDGE AND SPURIOUS EMISSIONS MEASUREMENT ................................................... 30 7.1 TEST PROCEDURE ............................................................................................................................................ 30 7.2 TEST SETUP ..................................................................................................................................................... 30 7.3 TEST RESULT ................................................................................................................................................... 31 Report No.: PTC251…

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Antenna describe 1. Antenna describe: Antenna plate PCB ANTENNA Make name/model name PDT-002 Antenna gain 0dBi Frequency range 2.4GHZ-2.483GHZ Connector type direct Laboratory Name: DONGGUANG XIAOKE INDUSTRLES.CO.,LTD Laboratory Address: NO. 227, DONGCHENG SECTION, GUANDONG ROAD, DONGCHENG STREET, DONGGUAN CITY,CHINA 2.External view drawing: Picture of antenna Antenna Dimensions L1 2.15 mm L2 1.20 mm L3 1.95 mm W1 0.35 mm W2 0.35 mm D1 1.25 mm D2 1.65 mm D3 0.50 mm 3.Antenna Radiation Pattern Radiation [email protected] Total Average Gain: - 0.475 dbi 0 45 90 135 180 235 270 315 Phi Gain - 0.2 - 0.3 - 0.8 - 0.5 - 0.2 - 0.5 - 0.8 - 0.5 Radiation [email protected] Total Average Gain: - 0.275 dbi 0 45 90 135 180 235 270 315 Phi Gain 0 - 0.2 - 0.4 - 0.6 - 0.1 - 0.3 - 0.6 - 0.4 Radiation [email protected] Total Average Gain: - 0.237 dbi 0 45 90 135 180 235 2 70 315 Phi Gain 0 - 0.2 - 0.3 - 0.5 0 - 0.3 - 0.6 - 0.2

Report No.: PTC25110415102E-FC01 Page 58 of 65 12 Test Setup Conducted Emissions Radiated Spurious Emissions Test Frequency From 30MHz to 1GHz Report No.: PTC25110415102E-FC01 Page 59 of 65 Test frequency from Above 1GHz