2BHBT-SF-777WWireless Microphone

Shenzhen Qi Yin Electronic Co., Ltd. Code 00018768 Ed. 1 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A Device Wireless Microphone Company name Shenzhen Qi Yin Electronic Co., Ltd. Grantee code 2BHBT FCC ID 2BHBT-SF-777W FRN 0035624600 Contact name Jason Zheng Address RM2008, 20FL, Tower C, Oriental Xintiandi Plaza, No.1003 Shennan Rd., Futian District Telephone number 0755-84260205 E-mail [email protected] Chipset/module information AD6976D4 Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A # General Requirements (For Linux system) Yes / No or N/A Comments 3 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher N/A 3 RAM: 1 GB N/A 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; N/A After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: 4 # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Jason Zheng Date:2026-01-14 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications.

ShenzhenQiYinElectronicCo.,Ltd. ProductSimilarityDeclaration Product:WirelessMicrophone ModelNumber:SF-777W,X3W,GM7W,SF-666W,Q3W FCCID:2BHBT-SF-777W We(ShenzhenQiYinElectronicCo.,Ltd.)herebystatethatallthe modelsareelectricalidenticalincludingthesamesoftwareparameter andhardwaredesign(i.e.,circuitdesign,PCBLayout,RF module/circuit,antennatype(s)andantennalocation,componentson PCB,etc.,),samemechanicalstructureanddesign(includingproduct enclosure,materials,etc.,),theonlydifferenceisthemodelname. Signature: Name:JasonZheng Title:salesDirector 2026.1.13

TCB CALL página 1 File FCC ID: 2BHBT-SF-777W Please upload an exhibit that explains how does the TCB verify the new agent information: 1- Is the address of the agent a valid physical US mailing address (not a US post office box, not a virtual mailbox, not P.O. Boxes, not a vacant lot, not a public building, etc.) ○ We have checked if the address exists in a real and potential building (Google maps) + official US register, after this verification and the evidence below we can guarantee the following: not a US post office box not a virtual mailbox not P.O. Boxes not a vacant lot not a public building(note) ► We checked the FCC FRN Search based on the information provided by the grantee. On the official register from : Search | coloradosos.gov TCB CALL página 2 TCB CALL página 3 TCB CALL página 4 TCB CALL página 5 ► CONCLUSION by TCB: The ASOP defined and provided by grantee is VALID and confirmed. Therefore the exhibit "US Agent Letter" included in the file is ok. 2- Is the agent physically located at that valid US address such that the agent can be legally served at that address? Yes , check above 3- Has the listed agent clearly agreed in writing to serve as the agent for the grantee at that address? Yes, it is included in the exhibit " US Agent Letter" >

ShenzhenQiYinElectronicCo.,Ltd. 2.911(d)(7)USAAgentv1.5 Section2.911(d)(7)USAAgentforServiceofProcess Companyname:ShenzhenQiYinElectronicCo.,Ltd Address:RM2008,20/FL,TowerC,OrientalXintiandiPlaza,No.1003ShennanRd., FutianDistrictShenzhen,GuangdongChina FCCID:2BHBT-SF-777W 2.911(d)(7)USADesignatedAgentforServiceofProcess We,[ShenzhenQiYinElectronicCo.,Ltd]designate[LinkwldLLC] NOTE1 forthe purposeofacceptingserviceofprocessonbehalfoftheapplicant. Applicantconsent:Weacknowledgeourconsenttoacceptserviceofprocessinthe UnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S. addressandemailaddressofthedesignatedagentandacknowledgeour acceptanceofourobligationtomaintainanagentforserviceofprocessintheUnited Statesfornolessthanoneyearaftereitherwethegranteehavepermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S., orattheconclusionofanyCommission-relatedadministrativeorjudicialproceeding involvingtheequipment,whicheverislater. Agentobligation:Weacknowledgeourobligationtoacceptserviceofprocessinthe UnitedStatesformattersrelatedtotheapplicableequipmentatourphysicalU.S. addressandemailaddressfornolessthanoneyearaftereitherthegranteehas permanentlyterminatedallmarketingandimportationoftheapplicableequipment withintheU.S.,orattheconclusionofanyCommission-relatedadministrativeor judicialproceedinginvolvingtheequipment,whicheverislater. USAAgentApplicant Companyname:LinkwldLLCCompanyname:ShenzhenQiYin ElectronicCo.,Ltd USAAddress:7595TechnologyWaySte 100,Denver,CO80237,US Address:RM2008,20/FL,TowerC, OrientalXintiandiPlaza,No.1003Shennan Rd.,FutianDistrictShenzhen,Guangdong China FRNNumber:0033625682GranteeFRNNumber:0035624600 ContactName:TimothyZhuFCCGranteeCode:2BHBT TelephoneNo:(747)717-2691ContactName:JasonZheng Email:[email protected] TelephoneNo:0755-84260205 Email:[email protected] Signature: Title:Manager Signature: Title:salesDirector ShenzhenQiYinElectronicCo.,Ltd. 2.911(d)(7)USAAgentv1.5 Date:2026-01-13Date:2026-01-13 NOTE1:AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforservice ofprocess. Reference;FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 Shenzhen Qi Yin Electronic Co., Ltd. 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: Shenzhen Qi Yin Electronic Co., Ltd. Grantee code: 2BHBT FCC ID: 2BHBT-SF-777W FRN: 0035624600 Contact Name: Jason Zheng Address: RM2008, 20FL, Tower C, Oriental Xintiandi Plaza, No.1003 Shennan Rd., Futian District Telephone No: 0755-84260205 Fax No: Email: [email protected] i. [Shenzhen Qi Yin 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. The applicant must sign this certification. ii. [Shenzhen Qi Yin Electronic Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Shenzhen Qi Yin 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 . Date: 2026/01/14 Applicant’s Name: Jason Zheng Title: sales Director 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

C5266091_X10_Ed.2 1/1 ShenzhenQiYinElectronicCo.,Ltd. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 Date:2026-01-13 Subject:RequestforConfidentiality FCCID:2BHBT-SF-777W ToWhomItMayConcern, PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules (47CFR0.457,0.459),wearerequestingtheCommissiontowithholdthefollowing attachment(s)asconfidentialdocumentfrompublicdisclosure. ExhibitsLong-Term Confidentiality Short-TermConfidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☒ BlockDiagram ☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☒ User’sManual ☐ NOTE 1 ☒ InternalPhotos ☐ NOTE 1 ☒ PartsList/TuneUp ☐☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERMCONFIDENTIALITY,Section3of KDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionare consideredasproprietaryinformationinoperationoftheequipment.Thepublic disclosureofabovedocumentsmightbeharmfultoourcompanyandwouldgive competitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselected abovearewithheldfrompublicviewforaperiodof180daysfromthedateofthe GrantofEquipmentAuthorizationandpriortomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondentduringcertificationreviewprocesscannotbegrantedasconfidential documentsandthoseinformationwillbeavailableforpublicreviewoncethegrantof equipmentauthorizationisissued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name:JasonZheng Title:salesDirector 2026.1.13

C5266091_X8_Ed.1 1/1 Letter of Authorization Shenzhen Qi Yin Electronic Co., Ltd. Company: Shenzhen Qi Yin Electronic Co., Ltd. Address: RM2008, 20FL, Tower C, Oriental Xintiandi Plaza, No.1003 Shennan Rd., Futian District Product Name: Wireless Microphone Model Number: SF-777W, X3W, GM7W, SF-666W, Q3W FCC Identifier: 2BHBT-SF-777W 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: Jason Zheng Date: 2026.01.14 Title: sales Director Signature of applicant:

LabelLocation Confirmtheuseofrealappearancephotosasreferences Labelsize: （ L:33cm*W:21cm ） ProductName:WirelessMicrophone ModelNo.:SF-777W FCCID:2BHBT-SF-777W

RFEXPOSUREEVALUATION FCCID:2BHBT-SF-777W AccordingtoKDB447498D01MobileandPortableDevicesRFExposureProcedures andEquipmentAuthorizationPoliciesv06. AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeusedto evaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF)Radiationas specifiedin§1.1307(b): RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,using measurementsorcomputersimulation.WhenroutineSARevaluationisnotrequired, portabletransmitterswithoutputpowergreaterthantheapplicablelowthresholdrequire SARevaluationtoqualifyforTCBapproval. Channel (MHz) Maximum output power (dBm) Tuneup tolerance (dBm) MaxTuneUp Power(dBm) Distance (mm) Calculation results Limit Operating Mode 24021.721.72±12.72050.5803 GFSK24402.012.01 ±1 3.01050.6253 24802.112.11±13.11050.6453 24021.951.95±12.95050.6113 GFSK24402.292.29 ±1 3.29050.6663 24802.432.43±13.43050.6943 Result:NoStandaloneSARtestisrequired.

InvertedFAntennaSpecification Summary ITEMANTSPEC ModelName 2.4GANT Center Frequency HorizontalVertical 2400MHz2450MHz2500MHz2400MHz2450MHz2500MHz -1.26dB-0.76dB-0.58dB-5.25dB-2.46dB-1.86dB MAX.Gain-0.58dB Polarization HorizontalandVertical AzimuthBeam Pattern Omni-directional Impedance50Ohm AntennaLength 38.20mm Manufacture ZHUHAIJIELITECHNOLOGYCO.,LTD AntennaPhoto&Length(mm) Address No. 333 Kexing Road, Nanping Science and Technology Park, Xiangzhou District, Zhuhai City, Guangdong Province, P.R.China Horizontal:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-40Scale:5/div Frequency (MHz) Gain(dB) Max MinAvg 2400-1.26174-30.0801-7.18716 2450-0.765802-36.5604-7.48023 2500-0.585582-22.0315-6.59127 Vertical:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-30Scale:5/div Frequency (MHz) Gain(dB) Max MinAvg 2400-5.2537-22.1424-12.4294 2450-2.4652-24.5837-10.4702 2500-1.86120-29.5214-9.20432 ANTTestLabs：AttestationofGlobalComplianceCo.,Ltd.

ReportNo.:1819C50140012501-01 Page 1 of 33 AppendixTestData ReportNo.:1819C50140012501-01TestSampleNo.:1-2-2 StartTestDate:2025-12-26FinishTestDate:2025-12-31 TestEngineer:Auditor: Temperature:19.7 °C RelativeHumidity:62% Pressure:101kPa AppendixA:6dBBandwidth TestResult Test Mode AntennaFrequency[MHz] 6dBBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict BLE_1MAnt124020.7202401.6562402.3760.5PASS BLE_1MAnt124400.6562439.6882440.3440.5PASS BLE_1MAnt124800.7122479.6602480.3720.5PASS BLE_2MAnt124021.1002401.4602402.5600.5PASS BLE_2MAnt124401.1522439.4442440.5960.5PASS BLE_2MAnt124801.1442479.4602480.6040.5PASS ReportNo.:1819C50140012501-01 Page 2 of 33 TestGraphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS ReportNo.:1819C50140012501-01 Page 3 of 33 BLE_1M-Ant1-2480-PASS BLE_2M-Ant1-2402-PASS ReportNo.:1819C50140012501-01 Page 4 of 33 BLE_2M-Ant1-2440-PASS BLE_2M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 5 of 33 AppendixB:99%OccupiedBandwidth TestResult Test Mode AntennaFrequency[MHz] OCB [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict BLE_1MAnt124021.03032401.49792402.5282------ BLE_1MAnt124401.04462439.49512440.5397------ BLE_1MAnt124801.03262479.49712480.5297------ BLE_2MAnt124022.06402400.98852403.0525------ BLE_2MAnt124402.08362438.98182441.0654------ BLE_2MAnt124802.08582478.98302481.0688------ ReportNo.:1819C50140012501-01 Page 6 of 33 TestGraphs BLE_1M-Ant1-2402 BLE_1M-Ant1-2440 ReportNo.:1819C50140012501-01 Page 7 of 33 BLE_1M-Ant1-2480 BLE_2M-Ant1-2402 ReportNo.:1819C50140012501-01 Page 8 of 33 BLE_2M-Ant1-2440 BLE_2M-Ant1-2480 ReportNo.:1819C50140012501-01 Page 9 of 33 AppendixC:Maximumconductedoutputpower TestResultPeak Test Mode Antenna Frequency [MHz] Conducted Peak Power[dBm] Conducted Limit[dBm] Verdict BLE_1MAnt124021.72≤30PASS BLE_1MAnt124402.01≤30PASS BLE_1MAnt124802.11≤30PASS BLE_2MAnt124021.95≤30PASS BLE_2MAnt124402.29≤30PASS BLE_2MAnt124802.43≤30PASS TestGraphsPeak BLE_1M-Ant1-2402-PASS ReportNo.:1819C50140012501-01 Page 10 of 33 BLE_1M-Ant1-2440-PASS BLE_1M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 11 of 33 BLE_2M-Ant1-2402-PASS BLE_2M-Ant1-2440-PASS ReportNo.:1819C50140012501-01 Page 12 of 33 BLE_2M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 13 of 33 AppendixD:Maximumpowerspectraldensity TestResult TestModeAntennaFrequency[MHz]Result[dBm/3kHz]Limit[dBm/3kHz]Verdict BLE_1MAnt12402-14.53≤8.00PASS BLE_1MAnt12440-14.12≤8.00PASS BLE_1MAnt12480-14.06≤8.00PASS BLE_2MAnt12402-16.69≤8.00PASS BLE_2MAnt12440-16.28≤8.00PASS BLE_2MAnt12480-16.12≤8.00PASS ReportNo.:1819C50140012501-01 Page 14 of 33 TestGraphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS ReportNo.:1819C50140012501-01 Page 15 of 33 BLE_1M-Ant1-2480-PASS BLE_2M-Ant1-2402-PASS ReportNo.:1819C50140012501-01 Page 16 of 33 BLE_2M-Ant1-2440-PASS BLE_2M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 17 of 33 AppendixE:Bandedgemeasurements TestResult Test Mode AntennaChName Frequency [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict BLE_1MAnt1Low24020.78-41.77≤-19.22PASS BLE_1MAnt1High24801.64-43.61≤-18.36PASS BLE_2MAnt1Low24020.87-33.46≤-19.13PASS BLE_2MAnt1High24801.13-46.35≤-18.87PASS Remark:Regardingthespuriousemissionsfrom30MHzto26.5GHz,thecablelosshavebeensetinthe 'offset'oftheSpectrumAnalyzerduringthetest. ReportNo.:1819C50140012501-01 Page 18 of 33 TestGraphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 19 of 33 BLE_2M-Ant1-2402-PASS BLE_2M-Ant1-2480-PASS ReportNo.:1819C50140012501-01 Page 20 of 33 AppendixF:ConductedSpuriousEmission TestResult Test Mode Antenna Frequency [MHz] Freq.Range [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict BLE_1MAnt124020~Reference0.230.23---PASS BLE_1MAnt1240230~10000.23-67.73≤-19.77PASS BLE_1MAnt124021000~265000.23-35.83≤-19.77PASS BLE_1MAnt124400~Reference0.920.92---PASS BLE_1MAnt1244030~10000.92-67.69≤-19.08PASS BLE_1MAnt124401000~265000.92-35.7≤-19.08PASS BLE_1MAnt124800~Reference1.091.09---PASS BLE_1MAnt1248030~10001.09-68.18≤-18.91PASS BLE_1MAnt124801000~265001.09-35.88≤-18.91PASS BLE_2MAnt124020~Reference0.840.84---PASS BLE_2MAnt1240230~10000.84-68.82≤-19.16PASS BLE_2MAnt124021000~265000.84-35.9≤-19.16PASS BLE_2MAnt124400~Reference1.571.57---PASS BLE_2MAnt1244030~10001.57-68.67≤-18.43PASS BLE_2MAnt124401000~265001.57-34.97≤-18.43PASS BLE_2MAnt124800~Reference0.350.35---PASS BLE_2MAnt1248030~10000.35-68.47≤-19.65PASS BLE_2MAnt124801000~265000.35-36.08≤-19.65PASS Remark:Regardingthespuriousemissionsfrom30MHzto26.5GHz,thecablelosshavebeensetinthe 'InputCorrection'oftheSpectrumAnalyzerduringthetest. ReportNo.:1819C50140012501-01 Page 21 of 33 TestGraphs BLE_1M-Ant1-2402-0~Reference-PASS BLE_1M-Ant1-2402-30~1000-PASS ReportNo.:1819C50140012501-01 Page 22 of 33 BLE_1M-Ant1-2402-1000~26500-PASS BLE_1M-Ant1-2440-0~Reference-PASS ReportNo.:1819C50140012501-01 Page 23 of 33 BLE_1M-Ant1-2440-30~1000-PASS BLE_1M-Ant1-2440-1000~26500-PASS ReportNo.:1819C50140012501-01 Page 24 of 33 BLE_1M-Ant1-2480-0~Reference-PASS BLE_1M-Ant1-2480-30~1000-PASS ReportNo.:1819C50140012501-01 Page 25 of 33 BLE_1M-Ant1-2480-1000~26500-PASS BLE_2M-Ant1-2402-0~Reference-PASS ReportNo.:1819C50140012501-01 Page 26 of 33 BLE_2M-Ant1-2402-30~1000-PASS BLE_2M-Ant1-2402-1000~26500-PASS ReportNo.:1819C50140012501-01 Page 27 of 33 BLE_2M-Ant1-2440-0~Reference-PASS BLE_2M-Ant1-2440-30~1000-PASS ReportNo.:1819C50140012501-01 Page 28 of 33 BLE_2M-Ant1-2440-1000~26500-PASS BLE_2M-Ant1-2480-0~Reference-PASS ReportNo.:1819C50140012501-01 Page 29 of 33 BLE_2M-Ant1-2480-30~1000-PASS BLE_2M-Ant1-2480-1000~26500-PASS ReportNo.:1819C50140012501-01 Page 30 of 33 AppendixG:DutyCycle TestResult Test Mode Antenna Frequency [MHz] ONTime [ms] Period [ms] DutyCycle [%] DutyCycle Factor[dB] BLE_1MAnt124022.202.5088.000.56 BLE_1MAnt124402.102.5084.000.76 BLE_1MAnt124802.102.5084.000.76 BLE_2MAnt124021.102.5044.003.57 BLE_2MAnt124401.102.5044.003.57 BLE_2MAnt124801.102.5044.003.57 ReportNo.:1819C50140012501-01 Page 31 of 33 TestGraphs NTNV-BLE_1M-Ant1-2402 NTNV-BLE_1M-Ant1-2440 ReportNo.:181…

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Page 1 of 34 FCC Test Report Report No.:1819C50140012501 Applicant:Shenzhen Qi Yin Electronic Co., Ltd. Address: RM2008, 20FL, Tower C, Oriental Xintiandi Plaza, No.1003 Shennan Rd., Futian District, Shenzhen, China Product Name:Wireless Microphone Report Date:2026-01-13 Shenzhen Anbotek Compliance Laboratory Limited #检测章# #资质章# Report No.:1819C50140012501Page 2 of 34 FCC ID: 2BHBT-SF-777W Contents 1. General Information ...............................................................................................................................6 1.1. Client Information ........................................................................................................................6 1.2. Description of Device (EUT) ........................................................................................................6 1.3. Auxiliary Equipment Used During Test........................................................................................7 1.4. Operation channel list..................................................................................................................8 1.5. Description of Test Modes...........................................................................................................8 1.6. Measurement Uncertainty ...........................................................................................................8 1.7. Additional Instructions .................................................................................................................9 1.8. Test Summary ...........................................................................................................................10 1.9. Description of Test Facility ........................................................................................................11 1.10. Disclaimer................................................................................................................................11 1.11. Test Equipment List.................................................................................................................12 2. Antenna requirement ...........................................................................................................................14 2.1. Conclusion.................................................................................................................................14 3. Conducted Emission at AC power line ................................................................................................15 3.1. EUT Operation ..........................................................................................................................15 3.2. Test Setup .................................................................................................................................15 3.3. Test Data ...................................................................................................................................16 4. 6dB Bandwidth ....................................................................................................................................18 4.1. EUT Operation ..........................................................................................................................18 4.2. Test Setup .................................................................................................................................18 4.3. Test Data ...................................................................................................................................18 5. Maximum Conducted Output Power....................................................................................................19 5.1. EUT Operation ..........................................................................................................................19 5.2. Test Setup .................................................................................................................................19 5.3. Test Data ...................................................................................................................................19 6. Power Spectral Density .......................................................................................................................20 6.1. EUT Operation ..........................................................................................................................20 6.2. Test Setup .................................................................................................................................20 6.3. Test Data ...................................................................................................................................20 7. Emissions in non-restricted frequency bands ......................................................................................21 7.1. EUT Operation ..........................................................................................................................21 7.2. Test Setup .................................................................................................................................21 7.3. Test Data ...................................................................................................................................21 8. Band edge emissions (Radiated) ........................................................................................................22 8.1. EUT Operation ..........................................................................................................................22 8.2. Test Setup .................................................................................................................................23 8.3. Test Data ...................................................................................................................................24 9. Emissions in restricted frequency bands (below 1GHz) ............................................…

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