2AFZZ-MHCB12G-BBluetooth Module

TheusermanualofBluetoothModule 1.Theproductdescription 3.ThedisplaymethodofModelapprovedcod The user can achieve wireless connection to BLE, through this module. 2. Basic parameters e Inthefactory，themodelapprovecodeislaseredontheshieldingcase. 4. FCCStatement 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： 5 Reorient or relocate the receivingantenna. Increase the separation between the equipment andreceiver. Connect the equipment into anoutlet ona circuit different fromthat towhichthe receiver isconnected.     Consult the dealer or an experienced radio/TV technician forhelp. FCC ID: 2AFZZ-MHCB12G-B . FeatureDescriptio FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolledenvironment and it also complies with Part 15 of FCC RF Rules. This equipment should be installed and operated with minimum distance of 20 in (50cm)between the radiator and yourbody. This transmitter must not be co-located or operatedin conjunction with any other antenna or transmitter. The device complies with Health requirements when the device is used at 50cm fromyour body. nFeatureDescription ModelMHCB12G-B ProductName BluetoothModule MajorChipsetRTL8762EMF BTStandardV5.0BLE BTFrequencyRange2402MHz~2480MHz ModulationMethod GFSK DataTransferRate1Mbps/2Mbps AntennaReferenceMHCB12G-B:InternalPrintedANT; InterfaceUART SupplyVoltage3.3V±0.3V DimensionMHCB12G-B:13.07（mm）*23.5（mm）*2.7（mm） OperatingTemperature -40°Cto85°C StorageTemperature -40°Cto85°C BTFrequencyRangeLimitedpower<20dBm This EUT is compliance with SAR for general population/uncontrolled exposure limits in IC RSS-102 and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528. This equipment should be installed and operated with minimumdistance 50cmbetween the radiator & your body. CAUTION To comply with the limits of the Class B digital device pursuant to Part 15 of the FCC Rules, this device is compliant with Class B limits. All peripherals must be shielded and grounded. Operation with non-certified peripherals or non- shielded cables may results in interference to radio or reception MODIFICATION To assure continued compliance, Any changes or modifications not expressly approved by the grantee of this device could void the users authority to operate the device. Module The OEM integrator has tobe aware not to provide informationto the end user regardinghowto install or remove this RF module in the user's manual of the end productwhichintegrates this module. The end user manual shall include all required regulatory information/warningas showinthis manual. This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed such that 5 0 cm is maintained between the antenna and users, and 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required. However,the OEM integrator is still responsible for testing their end-product for any additional compliance requirementsrequired with this module installed. 6.ICRadiationExposureStatement This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 50 cm(8 in ) between the radiator and your body NOTE To satisfy FCC exterior labeling requirements, the following text must be placed on the exterior of the end product Contains Transmitter module FCC ID: 2AFZZ-MHCB12G-B.To satisfy IESD exterior labeling requirements, the following text must be placed on the exte rior of the end product " Contains Transmitter module IC:25903-MHCB12GB. IC ID： This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions: "Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) (2) this device must accept any interference, including interference that may cause undesired operation of the device."Le présent appareil est conforme aux CNR d’ Industrie 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. IC ID: 25903-MHCB12GB Manufacturer: Xiaomi Communications Co.,Ltd. Address: #019, 9th Floor, Building 6, 33Xi′erqi Middle Road, Haidian District, Beijing, China CCXXxxYYyyyZzW A voltage stabilizing element or circuit is required on the power supplies to the module, and then the power supply is sent to the module. NCC警语 取得審驗證明之低功率射頻器材，非經核准，公司、商號或使用者均不得擅自變更頻率、加大功率或變更原設計之特性 及功能。低功率射頻器材之使用不得影響飛航安全及干擾合法通信；經發現有干擾現象時，應立即停用，並改善至無干 擾時方得繼續使用。前述合法通信，指依電信管理法規定作業之無線電通信。低功率射頻器材須忍受合法通信或工業、 科學及醫療用電波輻射性電機設備之干擾。 本模組於取得認證後將依規定於模組本體標示審驗合格標籤，並要求最終產品平台廠商(OEM Integrator)於最終產平 台(EndProduct)上標示:本產品內含射頻模組，其NCC型式認證號碼為:

XiaomiCommunicationsCo.,Ltd. #019,9thFloor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict To:FederalCommunicationsCommissionDate:2025.11.14 7435OaklandMillsRoad Columbia,MD21046 USA Attestation Section2.911(d)(5)(i)andSection2.911(d)(5)(ii) (KDB986446D01CoveredEquipment) Section2.911(d)(5)(i) XiaomiCommunicationsCo.,Ltd.(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Section2.911(d)(5)(ii) XiaomiCommunicationsCo.,Ltd.(“theapplicant”)certifiesthat,asofthedateof thefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListasan entityproducing“covered”equipment. TypeofEquipmentsubjecttoFCCCertification:BluetoothModule FCCID:2AFZZ-MHCB12G-B Ifyouhaveanyquestions,pleasefeelfreetocontactme Name:ZengQingyao JobTitle:CertificationManager DateofSignature:2025/11/14 ___________________________ Signatory (signatureoftheapplicant)

V01222025 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 UnitedStates Date:2025-11-4 Ref:AttestationStatementPart2.911(d)(7)Filing FCCID:2AFZZ-MHCB12G-B XiaomiCommunicationsCo.,Ltd.certifiesthat,as of thedatesof thisapplication,FCCUSAgent, LLCis ourdesignatedU.S.agentforserviceof processfortheabovereferencedFCCID.Xiaomi CommunicationsCo.,Ltd.acceptsto maintainanagentfornolessthanoneyearafterthegrantee hasterminatedallmarketingandimportationor theconclusionof anycommission-related proceedinginvolvingtheequipment. FCCUSAgent,LLCaccepts,as of thedateof thefilingof theapplication,theobligationof the designatedU.S.agentforserviceprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: NameFCCUSAgent,LLC FCC FRN0033402884 Address3722IllinoisAvenue,SaintCharles,IL, 60174,USA ContactPersonTimPayne Telephone708-571-3148 [email protected] Sincerely, XiaomiCommunicationsCo.,Ltd. FCCUSAgent,LLC 0024904948 ZengQingyao CertificationManager 0033402884 Tim Payne Manager

XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085 China AuthorizationLetter Date:2025.11.14 Towhomitmayconcern: We,theundersigned,herebyauthorizeTheStateRadio_monitoring_centerTestingCenter(SRTC)to actonourbehalf,asouragent,inthefollowingmattersrelatedtotheFCCapprovalofourproduct: ProductName:BluetoothModule ProductModel:MHCB12G-B FCCID:2AFZZ-MHCB12G-B Reportsubmittal,relatedcorrespondence,thesigningofalldocumentsrelatingtothesematters, andanyotherlawfulactivitynecessarytoobtainsuchcertification.AnyactcarriedoutbyTheState Radio_monitoring_centerTestingCenter(SRTC)withinthescopeofthisauthorizationshallhavethe sameeffectsasourown. Thisauthorizationshallexpire6monthsfromoriginaldate.Ifyouhaveanyquestionregardingthe authorization,pleasedon’thesitatetocontactwithme. Thankyou. Sincerely, XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict, Beijing,100085China

XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085China ModularApprovalRequestLetter 2025.11.14 DearApplicationExaminer, CompanyName:XiaomiCommunicationsCo.,Ltd., Productname:BluetoothModule Modelname:MHCB12G-B FCCID:2AFZZ-MHCB12G-B,wouldliketohaveyourauthorizationasamodularapproval.Therequirementsof PublicNoticeDA00-1407havebeenmetandshownonthefollowingstatements. RequirementofPublicNoticeDA00-1407/part15.212Answerfromapplicant 1.ThemodulartransmittermusthaveitsownRFshielding. Yes,ithasitsownRF shielding.Pleasereferto externalphotos. 2.Themodulartransmittermusthavebuffered modulation/datainputs(ifsuchinputsareprovided)to ensurethatthemodulewillcomplywithPart15 requirementsunderconditionsofexcessivedataratesor over-modulation. Yes,ithasbuffered modulation/datainputsto ensurethatthedevicewill complywithPart15 requirementswithanytypeof inputsignal. 3.Themodulartransmittermusthaveitsownpower supplyregulation. Yes,ithasapowersupply regulationfortransmitter insidethechip. 4.Themodulartransmittermustcomplywiththeantenna requirementsofSection15.203and15.204(c).Theantenna musteitherbepermanentlyattachedoremploya “unique”antennacoupler(atallconnectionsbetweenthe moduleandtheantenna,includingthecable).. Yes,therequirementsof antennaconnectorand spuriousemissionshavebeen fulfilled.PleaserefertoTest Report. 5.Themodulartransmittermustbetestedinastand-alone configuration,i.e.,themodulemustnotbeinsideanother deviceduringtesting.Thisisintendedtodemonstratethat themoduleiscapableofcomplyingwithPart15emission limitsregardlessofthedeviceintowhichitiseventually installed. Yes,itwastestedinastand- aloneconfiguration.Please refertoSetupPhoto. 6.ThemodulartransmittermustbelabeledwithitsownFCC IDnumber,and,iftheFCCIDisnotvisiblewhenthe moduleisinstalledinsideanotherdevice,thentheoutside ofthedeviceintowhichthemoduleisinstalledmustalso displayalabelreferringtotheenclosedmodule.This exteriorlabelcanusewordingsuchasthefollowing: “ContainsTransmitterModuleFCCID:XYZMODEL1”or “ContainsFCCID:XYZMODEL1.”Anysimilarwording thatexpressesthesamemeaningmaybeused.TheGrantee mayeitherprovidesuchalabel,anexampleofwhichmust beincludedintheapplicationforequipmentauthorization, or,mustprovideadequateinstructionsalongwiththe modulewhichexplainthisrequirement.Inthelattercase,a copyoftheseinstructionsmustbeincludedinthe applicationforequipmentauthorization. Yes,itislabelledwithits ownFCCIDnumber. Labellinginstructionsfor hostdevicesarestatedinthe usemanualunder“FCC warning” XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085China 7.Themodulartransmittermustcomplywithanyspecificrule oroperatingrequirementsapplicabletothetransmitterand themanufacturermustprovideadequateinstructionsalong withthemoduletoexplainanysuchrequirements.Acopy oftheseinstructionsmustbeincludedintheapplicationfor equipmentauthorization.Forexample,thereareverystrict operationalandtimingrequirementsthatmustbemet beforeatransmitterisauthorizedforoperationunder Section15.231.Forinstance,datatransmissionis prohibited,exceptforoperationunderSection15.231(e),in whichcasethereareseparatefieldstrengthlevelandtiming requirements.Compliancewiththeserequirementsmustbe assured. Yes,itcomplieswithany specificrulesoroperating requirements.Instructions areprovidedintheuser manual. 8.Themodulartransmittermustcomplywithanyapplicable RFexposurerequirements.Forexample,FCCRulesin Sections2.1091,2.1093andspecificSectionsofPart15, including15.319(i),15.407(f),15.253(f)and15.255(g), requirethatUnlicensedPCS,UNIIandmillimeterwave devicesperformroutineenvironmentalevaluationforRF Exposuretodemonstratecompliance.Inaddition,spread spectrumtransmittersoperatingunderSection15.247are requiredtoaddressRFExposurecomplianceinaccordance withSection15.247(b)(4).Modulartransmittersapproved underotherSectionsofPart15,whennecessary,mayalso needtoaddresscertainRFExposureconcerns,typicallyby providingspecificinstallationandoperatinginstructionsfor users,installersandotherinterestedpartiestoensure compliance. Yes,itcomplieswithRF exposurerequirements. PleaserefertoMPE calculationfortheexposure information. XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085China Yourssincerely， Signatory Name:ZengQingyao JobTitle:CertificationManager

XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085 China RequestofConfidentiality FederalCommunicationsCommissionAuthorizationandEvaluationDivision PursuanttoSections0.457and0.459oftheCommission’sRules,theApplicant herebyrequestsconfidentialtreatmentofinformationaccompanyingoffollowing product: ProductName:BluetoothModule ProductModel:MHCB12G-B FCCID:2AFZZ-MHCB12G-B Thefollowinginformationshouldbeheldconfidential: AllSchematics/blockdiagrams/BOM AllPartslistfortheaboveschematicdiagram Operationaldescriptionandtechnicaloverviewofproduct Theabovematerialscontaintradesecretsandproprietaryinformationnotcustomarily releasedtothepublic.Thepublicdisclosureofthesemattersmightbeharmfultothe applicantandprovideunjustifiedbenefitstoitscompetitors. TheapplicantunderstandsthatpursuanttoRule0.457,disclosureofthis applicationandallaccompanyingdocumentationwillnotbemadebeforethe dateoftheGrantforthisapplication. ZengQingyao,CertificationManager XiaomiCommunicationsCo.,Ltd. Address:#019,9 th Floor,Building6,33Xi’erqiMiddleRoad,HaidianDistrict,Beijing,100085 China

ProductPhoto FCCID:2AFZZ-MHCB12G-B IC:25903-MHCB12GB 1/2 ProductPhoto FCCID:2AFZZ-MHCB12G-B IC:25903-MHCB12GB 2/2

Laser Content： 1.QR code：4x4mm，12 Bit MAC 2.MODEL：Module model3.PN：XiaoMi PN 4.CMIIT ID：SRRC Number 5.FCC ID：FCC Number6.IC ID：IC Number 7.MAC：12 Bit MAC 8.Company Name9.Product Code 10、11.Fixd Log

ProductPhoto FCCID:2AFZZ-MHCB12G-B IC:25903-MHCB12GB 1/2 ProductPhoto FCCID:2AFZZ-MHCB12G-B IC:25903-MHCB12GB 2/2

FCC RF Exposure Test Report Report No. : PSU-NQN2504020112SA01 Issued Date : Nov.11 2025 Page 1 of 8 FCC RF Exposure Test Report Report No. : PSU-NQN2511070117SA01 Applicant : Xiaomi Communications Co.,Ltd. Address : #019, 9th Floor, Building 6, 33xi′erqi Middle Road, Haidian District,China Product : Bluetooth Module Brand Name : MI Model Name : MHCB12G-B FCC ID : 2AFZZ-MHCB12G-B Standards : FCC Part 2 (Section 2.1091) KDB 447498 D01 General RF Exposure Guidance v06 Date of Testing : Oct. 24, 2025 ~ Nov. 11, 2025 The FCC Site Registration No. The Designation No. : 434559 : CN1325 CERTIFICATION: The above equipment have been tested by Huarui 7Layers High Technology (Suzhou) Co., Ltd., and found compliance with the requirement of the above standards. The test record, data evaluation & Equipment Under Test (EUT) configurations represented herein are true and accurate accounts of the measurements of the sample’s SAR characteristics under the conditions specified in this report. It should not be reproduced except in full, without the written approval of our laboratory. The client should not use it to claim product certification, approval, or endorsement by A2LA or any government agencies. Prepared By : Approved By : (Chang Gao / Engineer) (Luke Lu /Manager) This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our- business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. FCC RF Exposure Test Report Report No. : PSU-NQN2504020112SA01 Issued Date : Nov.11 2025 Page 2 of 8 Table of Contents Release Control Record ............................................................................................................................................................... 3 1. Description of Equipment Under Tes ...................................................................................................................................... 4 2. MPE(Maximum Permissible Exposure) Assessment ............................................................................................................. 5 2.1 Introduction ........................................................................................................................................................................ 5 2.2 RF Radiation Exposure Limits ........................................................................................................................................... 5 2.3 MPE Assessment Method .................................................................................................................................................. 6 2.4 MPE Calculation for Standalone Operations ..................................................................................................................... 6 3. Information on the Testing Laboratories ................................................................................................................................ 8 FCC RF Exposure Test Report Report No. : PSU-NQN2504020112SA01 Issued Date : Nov.11 2025 Page 3 of 8 Release Control Record Report No. Reason for Change Date Issued PSU-NQN2511070117SA01 Original release Nov.11, 2025 FCC RF Exposure Test Report Report No. : PSU-NQN2504020112SA01 Issued Date : Nov.11 2025 Page 4 of 8 1. Description of Equipment Under Tes EUT Type* Bluetooth Module Brand Name* MI Model Name* MHCWB12G-B Tx Frequency Bands (Unit: MHz) 2402-2480MHz for BT-LE(GFSK) Uplink Modulations GFSK HW VERSION* V2.1 SW VERSION* V3.0.4 Antenna Type* PCB Antenna with 0.3dBi gain for BLE EUT Stage* NA Note: 1. *Since the above data and/or information is provided by the client relevant results or conclusions of this report are only made for these data and/or information , Test Lab is not responsible for the authenticity, integrity and results of the data and information and/or the validity of the conclusion. 2. The above EUT information is declared by manufacturer and for more detailed features description please refers to the manufacturer's specifications or User's Manual. FCC RF Exposure Test Report Report No. : PSU-NQN2504020112SA01 Issued Date : Nov.11 2025 Page 5 of 8 2. MPE(Maximum Permissible Exposure) Assessment 2.1 Introduction According to 47 CFR §2.1091, a mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 cm is normally maintained between the transmitting antenna and the body of the user or nearby persons. In this context, the term “fixed lo…

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Page1of10 CustomerName:XiaomiCommunicationTechnologyCo.LTD ProductName:2.4GHzBTModule SampleModel:MHCB12G-B ReferenceStandard:GB/T9410-2008;ANSI/IEEEStd149-1979 TestDate:2025.7. Antenna Specification 3 RoleNameDate Engineer2025.7.3 Auditor2025.7.3 Approver2025.7.3 Page2of10 Version VersionNo.DateDescriptionFormulateApproval A02025.7.3Forthefirsttime,formulateLinYuzheZhangHe Contents TestingReport............................................................................................................................1 1.GeneralInformation........................................................................................................3 1.1Generalinformationoftestinginstitutions........................................................3 1.2Testingprinciple................................................................................................3 1.3Testequipment..................................................................................................4 1.4Testenvironment...............................................................................................4 1.5Statement...........................................................................................................4 2.SampleInformation.........................................................................................................5 2.1Clientinformation................................................................................................5 2.2DescriptionofSample..........................................................................................5 2.3Sampleappearance...............................................................................................6 2.4Antennasize.........................................................................................................6 2.5DUTsetupphotooffreespaceOTAtesting........................................................7 3.TestResults.....................................................................................................................7 3.1Teststandard......................................................................................................7 3.2Testuncertainty.................................................................................................8 3.3Testdata.............................................................................................................9 3.3.1NetworkanalyzerSparameter..................................................................9 3.3.2S11Data....................................................................................................9 3.3.3Typicalfreespaceefficiencyandgain......................................................9 3.3.4Typicalfreespaceradiationpattern........................................................10 Page3of10 1.GeneralInformation 1.1Generalinformationoftestinginstitutions NameXiaomiCommunicationTechnologyCo.LTD Address #019,9thFloor,Building6,33Xi'erqiMiddleRoad,HaidianDistrict, Beijing,China Tel010-6060666 1.2Testingprinciple Multi-ProbeOTAMeasurementSystem Page4of10 1.3Testequipment EquipmentModelNo.SerialNo.Manufacturer Calibration date Next calibration date Network Analyzer Rohde&Schwarz102231ZND2024101820251018 1.4Testenvironment Temperature 23.9°C Humidity 24%RH Pressure 100.32kPa 1.5Statement (1)Thetestresultsinthereportareonlyapplicabletothetestedsamplesandthetestedsamplesworkunderthe environmentdescribedinthereport. (2)OnlyXiaomiCommunicationTechnologyCo.LTD.havetherighttomodifythereport,andthe modificationinformationshallbeannotatedintherevisionform. (3)Anyobjectiontothisreportshallberaisedwithin30daysafterformalconfirmationofthereport. (4)Thisreportisinvalidifthereisanyevidencethatthesampleinformationprovidedisfalsified. (5)Thereportisinvalidwithoutthesignatureoftheauditorandapprover. Page5of10 2.1Clientinformation NameXiaomiCommunicationTechnologyCo.LTD Address #019,9thFloor,Building6,33Xi'erqiMiddleRoad,HaidianDistrict, Beijing,China,100085 2.2DescriptionofSample ProductName2.4GHzBTModule SampleModleMHCB12G-B TestItemVSWR,PeakGian,RadiationEfficiency,Radiationpattern FrequencyRange2400-2480MHz ReceivedDate2025.7.3 TestDate2025.7.3 RemarkRFCable:cablelength=50mm,IPEX 2.SampleInformation Page6of10 2.3Sampleappearance 2.4Antennasize Page7of10 2.5DUTsetupphotooffreespaceOTAtesting 3.TestResults 3.1Teststandard NameParameterMethodStandardno. Mobile communication antenna VSWR Generic specificationfor antennasusedin themobile communications GB/T 9410-2008 Antennagain Page8of10 Radiationpattern Antenna Radiationefficiency IEEEStandard TestProcedures forAntennas ANSI/IEEEStd 149-1979 Gainanddirectivity 3.2Testuncertainty TheuncertaintywascalculatedonthebasisoftheGUMpublishedbyISO,usingthe inclusionfactorofK=2andthe95%confidenceleveltoexpresstheextendeduncertainty. ItemUncertainty VSWR±0.3 Antennagain±1.0dBi Radiationefficiency±10% Page9of10 3.3Testdata 3.3.1NetworkanalyzerSparameter 3.3.2S11Data Fequency/MHz 240024402480 VSWR 2.11.02.2 3.3.3Typicalfreespaceefficiencyandgain Fequency/MHz 240024102420243024402450246024702480 PeakGain/dBi -0.40.10.20.30.30.30-0.2-0.4 Page10of10 Efficiency/% 41.245.646.847.748.948.745.94340.9 3.3.4Typicalfreespaceradiationpattern (1)X-YPlane: Page11of10 (2)Y-ZPlane: (3)X-ZPlane: Page12of10 (4)TypicalFreeSpace3DRadiationPatternat2440MHz: -------------------------------------------------End------------------------------------------------ (Thefollowingisblank)

Huarui 7layers High Technology (Suzhou) Co., Ltd. Tower N, Innovation Center, 88 Zuyi Road, High-tech District, Suzhou City, Anhui Province, China Tel: +86 (0557) 368 1008 Page 1 of 52 Report Version 1 Test Report No.: PSU-NQN2511070117RF01 FCC TEST REPORT (Part 15, Subpart C) Applicant: Xiaomi Communications Co.,Ltd. Address: #019, 9th Floor, Building 6, 33Xi′erqi Middle Road, Haidian District, China Manufacturer or Supplier: Xiaomi Communications Co.,Ltd. Address: #019, 9th Floor, Building 6, 33Xi′erqi Middle Road, Haidian District Product: Bluetooth Module Model Name: MHCB12G-B FCC ID: 2AFZZ-MHCB12G-B Date of tests: Oct. 24, 2025 ~ Nov. 11, 2025 The tests have been carried out according to the requirements of the following standard: FCC Part 15, Subpart C, Section 15.247 ANSI C63.10-2020 CONCLUSION: The submitted sample was found to COMPLY with the test requirement Prepared by Hanwen Xu Engineer / Mobile Department Approved by Luke Lu Manager / Mobile Department Date: Nov. 11, 2025 Date: Nov. 11, 2025 This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our-business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Huarui 7layers High Technology (Suzhou) Co., Ltd. Tower N, Innovation Center, 88 Zuyi Road, High-tech District, Suzhou City, Anhui Province, China Tel: +86 (0557) 368 1008 Page 2 of 52 Report Version 1 Test Report No.: PSU-NQN2511070117RF01 TABLE OF CONTENTS RELEASE CONTROL RECORD ............................................................................................................ 4 1 SUMMARY OF TEST RESULTS .................................................................................................... 5 1.1 MEASUREMENT UNCERTAINTY ............................................................................................... 6 2 GENERAL INFORMATION ............................................................................................................ 7 2.1 GENERAL DESCRIPTION OF EUT ............................................................................................. 7 2.2 DESCRIPTION OF TEST MODES ............................................................................................... 8 2.2.1 CONFIGURATION OF SYSTEM UNDER TEST .................................................................. 9 2.2.2 TEST MODE APPLICABILITY AND TESTE…

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