2BWTU-MBZ255Smart Sound Machine

UserOperationManual MBZ-255 Thankyouforusingourproduct. Pleasereadthismanualcarefullybefore turningonthedevice. SmartWhiteNoiseSoundMachine 1 APPconnectionandusagemethod Step1:Downloadtheapp Searchfor“TuYa”intheappstoreorscantheQRcodeon therighttodownloadandregister.Ensureyourphonehas Bluetoothandlocationenabledbeforeproceeding. Step2:Poweronthedeviceandenternetwork configurationmode (1)Afterreceivingthedevice,long-pressandhold thepowerbuttonfor3secondstopoweriton. Oncepoweredon,thedevicewillemitanotification soundandthepowerindicatorlightwillturnblue. (2)Afterstartup,long-pressthebuttonsand, simultaneouslytoactivatenetworkconfiguration. Onceinnetworkconfigurationmode,thedevice's bluelightwillflashcontinuously. 2 Step3:OperateAPP Afteropeningthe“TuYa”APP,clickthe“+”iconinthetop-rightcornertoadda device.EnsurethedeviceisconnectedtothenetworkandwithinBluetoothrange. Step4:Adddevice Clicktoaddthedevice.Aftertheconnectionissuccessful,thedevicewilllightup withagreenlightandemitanotificationsound,andtheAPPwilljumptothe device'shomepage. 3 Productillustrationdescription: SceneButton Shortpress:Nextsong Longpress:Switch scenemode ModeButton Shortpress:Previoustrack Longpress:SwitchBluetooth music/Whitenoisemode Lighton/offbutton Shortpress:Turnlighton/off Longpress:Increaseordecreasethelightbrightness VolumeUpButton VolumeDownButton PowerOn/OffButton Shortpress:Play/Pause Longpress:Poweron/off PowerLight TimingIndicatorLight LightModeButton Shortpress:Turnon/switch lightmodes Longpress:Settimerto 30/60/90Min Type-CChargingPort Lamp ResetHole UseamobilephoneSIM cardejectortogentlypoke theholetoforceshutdown 4 Productparameter: Operatingvoltage:3.7V Dynamiccurrent:lessthan200mAwhenoff,lessthan600mAwhenon Speaker:4Ω3W Adapterspecifications:InputAC:100-240V,50/60Hz;OutputDC:5V,1A Productdimensions:84mm×84mm×81mm Includedaccessories:Type-Cchargingcable*1,Usermanual*1 Batteryandpowerindicatorlights: Thepowerindicatorandtheappdisplayallowyoutoeasilycheckthedevice's batterylevel. Battery status PowerlightAPPbatterystatus Normal power Turnon:bluelight FullychargedNearlyfull Lesspower Charging Off:redlight On:bluelight+redlight Charging Fullof electricity Greenlight Fullychargedandcharging Lowpower Turnon:redlight flashing Lowpower Lowpowershutdown 5 Modeswitch: Taptheappiconorlong-pressthedevicebuttontoswitchbetween whitenoiseandBluetoothmusicmode. (“”isBluetoothMusicmode,“”isWhiteNoisemode): (1)Thewhitenoisemodeallowsplaybackof36pre-installedsleep-inducingtracks. (2)BluetoothMusicModesupportsmobileaudioplayback(scenarioanditinerary previewsarenotavailable). Bluetoothinstructionsforconnectingyourphonetothedevice(thedevicemustbein BluetoothMusicmode!): Step1:SwitchthedevicetoBluetoothStep2:OpenSettingsonyourphone Musicmode 6 Step3:TurnonBluetoothandsearchStep4:ClicktheBluetoothname forthedevice“MBZ_255_****”topair Step5:EnterpairedBluetoothandStep6:Openthemusicapponyour confirmvolumesyncphoneandplaymusic(Theabove imageareforreferenceonly) 7 Lightsettings: (1)Youcancustomizecoloredlightingbyselecting yourpreferredcolorsfromthecolorwheel.Theleft panelfeaturesthreeoptions:NightLight,Breathing Light,andTransformingLight. (2)WhenplayinglocalmusicviaBluetooth,the breathingandchanginglightswillsynchronizewiththe music'srhythm.Afterthemusicstops,thelightswill reverttotheirnormalbreathingandchangingpatterns. Sleep-Aidsoundsettings: Playablesoundsincludeobjectsounds,naturalsounds, ambientsounds,andsleepsounds.Thereare36 sleep-inducingmusictracksintotal.Clickthemusicicon belowtoswitchtracks,orswipetoadjustthevolume. Pairingthesesleep-inducingmusictrackshelpsyoufall asleepfaster. 8 Functiondescription: 1.Volume:Toadjustvolumeduringmusicplayback,pressandholdthevolume +/-buttons.Whensettomaximumorminimumvolume,thepowerindicatorlightwill flashbluefor3seconds. 2.Brightnessadjustment:Thedeviceshouldbesettoadjustablebrightnesswhenthe lightsareon.Whenadjustedtothebrightestordarkestlevel,thebluepowerindicator lightwillflashfor3seconds. 3.ChildLock:Thisfeaturelocksdevicebuttonstopreventaccidentaloperationby children. (1)Activation:TheChildLockfeaturerequiresactivationthroughtheapp.When enabled,pressinganybuttononthedevicewilltriggerthetimerindicatortoflashthree times,confirmingthelockisactive.Allotherbuttonfunctionswillbedisabled. (2)Shutdown:Youcaneitherclosethechildlockdirectlythroughtheapporpressand holdthepowerbuttonoranyotherbuttononthedevicefor3secondstoturnitoff.After shutdown,thedevice'stimerindicatorwilllightupfrombottomtotop,confirmingthe childlockisdisabled,andthedevicewillresumenormaloperation. ThechildlockisoffThechildlockison 9 4.Memoryfunction:Supportsbattery-freememory,savingthelastsettingsof scenemode,music,andlightinguponpower-on. 5.SmartPowerSaving:Topreventpowerwastefromforgottenshutdown,thedevice supportssmartpowersavingmode. (1)Thedevicewillautomaticallyshutdownifnooperationisperformedwithintheset time.Thedevicedefaultstoa10-minuteidletime.Theappallowsyoutosetthe shutdowntime,whichcanbe10,20,or30minutes,orsettoneverauto-shutdown. (2)Whenthedeviceisplayingmusic,turningonlights,orstartingacountdown,itis consideredinuseandwillnotauto-shutdown. 10 Customscenariomode: Saveyourfavoritelightingandmusicasasceneforinstantaccesswithoneclick, eliminatingmanualsetup. (1)Thedevicefeatures5presetscenarioswithupto8customizablescenarios. (2)Clicktoquicklyaddoreditscenarios.Youcansetlightingandbrightness, sleep-inducingmusic,andvolume(youcanpreviewthelightingandmusiceffects). (3)Clicktoentertheeditinginterfacetoadd,modify,ordeletescenarios. (4)Longpressandholdthebuttononthedevicetoswitchtosavedscenarios. Aftereachoperation,thedevicewillplaythescenariosintheorderspecifiedbytheAPP. 11 Schedule: Ascheduleisanautomationfunction.Withpre-setlightsandmusic,thedevicewill automaticallyturnonandrunatthespecifiedtime,andautomaticallyturnoffwhenthe endtimeisreached. (1)Inaschedule,youcansetthelightanditsbrightness,sleep-aidingmusic,volume level,timerangeoftheschedule,repeatcycle,andchildlockswitch(supports previewingthematchingeffec…

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Page 1 of 4 Report No.: STS2512145 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: MBZ255, MBZ256, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 Photo 1 Photo 2 Page 2 of 4 Report No.: STS2512145 Photo 3 Photo 4 Page 3 of 4 Report No.: STS2512145 Photo 5 Photo 6 Page 4 of 4 Report No.: STS2512145 Photo 7 Photo 8

Page 1 of 4 Report No.: STS2512145 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: MBZ257 Photo 1 Photo 2 Page 2 of 4 Report No.: STS2512145 Photo 3 Photo 4 Page 3 of 4 Report No.: STS2512145 Photo 5 Photo 6 Page 4 of 4 Report No.: STS2512145 Photo 7 Photo 8

FCC Label \ FCC ID: 2BWTU-MBZ255 40mm&40mm FCC ID: 2BWTU-MBZ255 40mm&40mm

Page 1 of 4 Report No.: STS2512145 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: MBZ255, MBZ256, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 Photo 1 Photo 2 Page 2 of 4 Report No.: STS2512145 Photo 3 Photo 4 BT Antenna Page 3 of 4 Report No.: STS2512145 Photo 5 Photo 6 Page 4 of 4 Report No.: STS2512145 Photo 7 Photo 8

Page 1 of 4 Report No.: STS2512145 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: MBZ257 Photo 1 Photo 2 Page 2 of 4 Report No.: STS2512145 Photo 3 Photo 4 BT Antenna Page 3 of 4 Report No.: STS2512145 Photo 5 Photo 6 Page 4 of 4 Report No.: STS2512145 Photo 7 Photo 8

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.:STS2512145H03 Issued for Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Product Name: Smart Sound Machine Brand Name: Maifar Model Name: MBZ255 Series Model(s): MBZ256, MBZ257, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 FCC ID: 2BWTU-MBZ255 Test Standards: FCC 47CFR §2.1093 Page 2 of 9 Report No.: STS2512145H03 TEST REPORT Applicant’s Name ................. : Shenzhen Maifar Technology Co.,Ltd Address ................................. : 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Manufacturer's Name ........... : Shenzhen Maifar Technology Co.,Ltd Address ................................. : 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Product Description Product Name ........................ : Smart Sound Machine Brand Name .......................... : Maifar Model Name .......................... : MBZ255 Series Model(s) ...................... : MBZ256, MBZ257, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 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 ...................... : 15 Dec. 2025 Date (s) of performance of tests ............. : 15 Dec. 2025 ~ 29 Dec. 2025 Date of Issue .......................................... : 29 Dec. 2025 Test Result .............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 9 Report No.: STS2512145H03 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.: STS2512145H03 Revision History Rev. Issue Date Report No. Effect Page Contents 00 29 Dec. 2025 STS2512145H03 ALL Initial Issue Page 5 of 9 Report No.: STS2512145H03 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name Smart Sound Machine Brand Name Maifar Model Name MBZ255 Series Model(s) MBZ256, MBZ257, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 Model Difference The internal circuits are identical, differing only in appearance Product Description The EUT is Smart Sound Machine Operation Frequency: 2402~2480 MHz Modulation Type: BT BR(1Mbps): GFSK BT EDR(2Mbps): π/4-DQPSK BT EDR(3Mbps): 8DPSK BLE: GFSK Antenna gain: -2dBi Antenna Designation: PCB Power Rating Input:DC5V/1A Output:5W Adapter N/A Battery Model: LDTSL18650 1800-1P Brand: N/A Rated Voltage: 3.7 V Charge Limit Voltage: 4.2 V Capacity: 1800 mAh Hardware Version MBZ255 MAIN VER1.5 20251016 Software Version MBZ255-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.: STS2512145H03 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.: STS2512145H03 (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-…

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Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Report for MBZ255 Tested Products. Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China • Antenna 1: PCB antenna. • Frequency =2402MHz • Frequency =2404MHz • Frequency =2440MHz • Frequency =2441MHz • Frequency =2472MHz • Frequency =2480MHz Coordinate System Reference: Antenna-RX Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2402MHz Z x Y Coordinate System Reference: Antenna-RX Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2402MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2404MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2404MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2440MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2440MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2441MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2441MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2472MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2472MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 3D Pattern at f = 2480MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Radiation pattern: Antenna 2D Pattern at f = 2480MHz Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Rturn Loss: Antenna1 Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Measurements summary

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.:STS2512145W04 Issued for Shenzhen Maifar Technology Co.,Ltd 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Product Name: Smart Sound Machine Brand Name: Maifar Model Name: MBZ255 Series Model(s): MBZ256, MBZ257, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 FCC ID: 2BWTU-MBZ255 Test Standards: FCC Part15.247 Page 2 of 55 Report No.: STS2512145W04 TEST REPORT Applicant’s Name ................. : Shenzhen Maifar Technology Co.,Ltd Address ................................. : 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Manufacturer's Name .......... : Shenzhen Maifar Technology Co.,Ltd Address ................................. : 4th Floor Building B, Shenzhen Longhua Furanna Wisdom Park, No.1 Qingning Road, Qinghu Community, Longhua Sub-district, Longhua District, Shenzhen, China Product Description Product Name ....................... : Smart Sound Machine Brand Name .......................... : Maifar Model Name .......................... : MBZ255 Series Model(s) .................... : MBZ256, MBZ257, MBZ258, MBZ259, MBZ261, MBZ262, MBZ263, MBZ265, MBZ266, MBZ267, MBZ268, MBZ269, MBD1, MBD2, MBD3, MBD5, MBD6, MBD7, MBD8, MBD9 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 FCC 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 ..................... : 15 Dec. 2025 Date (s) of performance of tests ............. : 15 Dec. 2025 ~ 29 Dec. 2025 Date of Issue .......................................... : 29 Dec. 2025 Test Result.............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 55 Report No.: STS2512145W04 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 9 2.3 TEST SOFTWARE AND POWER LEVEL 9 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 10 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 11 2.6 EQUIPMENTS LIST 12 3. EMC EMISSION TEST 13 3.1 CONDUCTED EMISSION MEASUREMENT 13 3.2 TEST PROCEDURE 14 3.3 TEST SETUP 14 3.4 EUT OPERATING CONDITIONS 14 3.5 TEST RESULTS 15 4. RADIATED EMISSION MEASUREMENT 17 4.1 RADIATED EMISSION LIMITS 17 4.2 TEST PROCEDURE 19 4.3 TEST SETUP 20 4.4 EUT OPERATING CONDITIONS 20 4.5 FIELD STRENGTH CALCULATION 21 4.6 TEST RESULTS 22 5. DUTY CYCLE 29 5.1 TEST STANDARD 29 5.2 TEST PROCEDURE 29 5.3 DEVIATION FROM STANDARD 29 5.4 TEST SETUP 29 5.6 TEST RESULTS 29 6. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 6.1 LIMIT 30 6.2 TEST PROCEDURE 30 6.3 TEST SETUP 30 Page 4 of 55 Report No.: STS2512145W04 Table of Contents Page 6.4 EUT OPERATION CONDITIONS 30 6.5 TEST RESULTS 30 7. POWER SPECTRAL DENSITY TEST 31 7.1 LIMIT 31 7.2 TEST PROCEDURE 31 7.3 TEST SETUP 31 7.4 EUT OPERATION CONDITIONS 31 7.5 TEST RESULTS 31 8. BANDWIDTH TEST 32 8.1 LIMIT 32 8.2 TEST PROCEDURE 32 8.3 TEST SETUP 32 8.4 EUT OPERATION CONDITIONS 32 8.5 TEST RESULTS 32 9. PEAK OUTPUT POWER TEST 33 9.1 LIMIT 33 9.2 TEST PROCEDURE 33 9.3 TEST SETUP 34 9.4 EUT OPERATION CONDITIONS 34 9.5 TEST RESULTS 34 10. ANTENNA REQUIREMENT 35 10.1 STANDARD REQUIREMENT 35 10.2 EUT ANTENNA 35 APPENDIX 1-TEST DATA 36 MAXIMUM PEAK CONDUCTED OUTPUT POWER 36 -6DB BANDWIDTH 39 OCCUPIED CHANNEL BANDWIDTH 42 MAXIMUM POWER SPECTRAL DENSITY LEVEL 45 BAND EDGE 48 CONDUCTED RF SPURIOUS EMISSION 51 APPENDIX 2- EUT TEST PHOTO 55 Page 5 of 55 Report No.: STS2512145W04 Revision History Rev. Issue Date Report No. Effect Page Contents 00 29 Dec. 2025 STS2512145W04 ALL Initial Issue Page 6 of 55 Report No.: STS2512145W04 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 7 of 55 Report No.: STS2512145W04 1.1 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 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751d…

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Page 1 of 2 FCC ID: 2BWTU-MBZ255 Setup photo AC Conduction RF Conduction Page 2 of 2 FCC ID: 2BWTU-MBZ255 RE (Below 1GHz) RE (Above 1GHz)