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2BALT-TWS888True Wireless Stereo Earphones

HIFIMAN KUNSHAN TECHNOLOGY GROUP CO.,LTD
True Wireless Stereo Earphones - FCC ID 2BALT-TWS888 - HIFIMAN KUNSHAN TECHNOLOGY GROUP CO.,LTD
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Application Details

Equipment Class
DSS - Part 15 Spread Spectrum Transmitter
Date of Grant
Sep 04, 2023
Application Purpose
Original Equipment
Date of Application
Sep 04, 2023
Equipment Note
True Wireless Stereo Earphones
Frequency Range
2402.00000000 - 2480.00000000
Company
HIFIMAN KUNSHAN TECHNOLOGY GROUP CO.,LTD
Country
China

Documents & Files

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Users Manual

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Attestation Statements

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Cover Letter(s)

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External Photos

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ID Label/Location Info

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Internal Photos

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RF Exposure Info

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Test Report

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Test Setup Photos

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Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

Users Manual

1 / 13 蓝牙耳机中英文说明书 Bluetooth Headset 使用说明书 User Manual Model:TWS888 Brand:HIFIMAN Manufacturer:Shenzhen Roman Technology Co., Ltd Address:Suite 201, No.7 Building, 66 Tongli Road, Tongxin Community, Baolong, Longgang District, Shenzhen City, China FCC ID :2BALT-TWS888 2/13 概述 Welcome 感谢您选择了我们的产品。本公司蓝牙耳机外观设计时尚、功能强大、兼容性好,让您真正体验到无线打电话、听 音乐的乐趣!是您办公、外出、驾驶的最佳选择! Thankyouforchoosingourproducts.Ourbluetoothheadsethasastylishdesign,powerfulfunctions, andhighcompatibility,whichcanprovideyouwithahands-freeexperiencewhilemakingcallsandlistening tomusic.Itisthebestchoiceforofficeuse,outdooractivitiesanddriving. 蓝牙无线技术 BluetoothWirelessTechnology 通过蓝牙无线技术,您无需使用线缆就可以将耳机连接至与其相兼容的通信设备。蓝牙无线连接无需保持手机与耳 机相互正对,但两者之间的最大距离不应该超过10米(约30英尺),蓝牙无线连接可能因墙壁等障碍物或其他电 子设备而受到干扰。 WiththeBluetoothwirelesstechnology,youcanconnecttheearphonetoitscompatiblecommunicationdeviceswithout usingcables.TheBluetoothwirelessconnectionallowsyoutouseacellphonewithoutholdingitagainsttheearphone,but themaximumdistancebetweenthemcannotexceed10meters(about30feet).TheBluetoothwirelessconnectionmaybe interferedbyobstacles(suchaswalls)orotherelectronicdevices. 在某些地区,使用蓝牙无线技术可能受到一些限制,请向当地主管部门或服务供应商咨询。 Insomeareas,useoftheBluetoothwirelesstechnologymaybesubjecttosomeconstraints.Pleaseconsultyourlocal authorityorserviceproviderfordetails. 3/13 使用前请为耳机进行一次完全充电(充电方法参考本书充电篇),同时选择与该耳机相兼容的手机和其他蓝牙终端 设备进行配对(配对方法参照基本操作篇)。 Pleasefullychargetheheadsetbeforeuse(refertotheChargingInstructionssectionofthisbookfor charginginstructions).SelectamobilephoneorotherBluetoothterminaldevicecompatiblewiththe headsetforpairing(refertotheBasicOperationsforthepairingmethod). 温馨提示:请勿使用信用卡或其他磁性存储器介质靠近耳机,以免因消磁而失去存储信息。 Tips:Donotusecreditcardsorothermagneticstoragemediaclosetotheheadsettoavoidlosingstorage informationduetodegaussing. 4/13 蓝牙耳机配对连接方法(注:以苹果手机为例) Bluetoothheadsetpairingandconnectionmethod(Note:TakeApplemobilephoneasanexample) 为方便用户操作,在您购买此产品前出厂时已经完成两只蓝牙耳机之间的左、右声道立体音互连配对设置! Fortheconvenienceofuseroperation,theleftandrightstereosoundinterconnectionpairingsettingsbetweenthetwo Bluetoothheadsetshavebeencompletedbeforeyoupurchasethisproduct! ●耳机初次使用Dual-earmode:Initialuseofheadsets 1. 初次使用时将左右耳机从充电盒中取出,将两只耳机放入充电盒,两只耳机指示灯亮,耳机激活。 1.Takeoutbothleftandrightearphonesfromthechargingboxwhenusingitforthefirsttime.Putbothearphonesback intothechargingbox.Thetwoearphoneindicatorlightsison.Theheadsetisactivated. 2 、打开充电盒盖子取出耳机会自动开机并进入配对状态,耳机有提示音。 2.Openthecoverofthechargingbox.Takeearphoneoutfromthechargingbox.Theheadsetisautomaticallypoweredon andenterspairingstatus,withaprompttonewhencompletingtheTWSpairing. 3 、打开手机蓝牙,搜索蓝牙耳机设备。搜索到蓝牙耳机后,点击配对,完成连接。 3.Turnonthephone'sBluetoothandsearchforBluetoothheadsetdevices.AfterfindingtheBluetoothheadset,clickPairto completetheconnection. 5/13 基本操作 BasicOperations 功能名称 functionname 操作方式及状态Operationmodeandstatus 自动开/关机 Autoon/off 使用时只需打开充电盒取出耳机自动开机且TWS连接成功,主耳会进入白灯快闪的配对状态持续约5 分钟,配对超时后直自动关机。(注意:在开机状态下,不连接蓝牙设备,在开启降噪时,配对超时5分 钟后耳机将一直保持降噪工作状态,直至电量低后自动关机) Whenusing,justopenthechargingboxandtakeouttheearphone,itwillautomaticallyturn onandtheTWSconnectionissuccessful.Themainearphonewillenterthepairingstatewith awhitelightflashingquicklyforabout5minutes,anditwillautomaticallyshutdownafterthe pairingtimeout.(Note:Inthepower-onstate,donotconnecttheBluetoothdevice,whenthe noisereductionisturnedon,theheadsetwillkeepthenoisereductionworkingstateafterthe pairingtimeoutfor5minutes,untilthepowerislowandautomaticallyshutdown) 连接 connect 打开充电盒同时取出耳机(L)和耳机((R),TWS自动配对成功后主耳会进入白灯快闪状态,副耳每间隔 2秒LED闪烁一次,手机搜索配对名,点击连接,成功连接会有提示音 6/13 Openthechargingboxandtakeouttheearphones(L)andearphones((R)atthesametime. AftertheTWSisautomaticallypairedsuccessfully,themainearwillenterawhitelight flashingstate,andthesecondaryearLEDwillflashonceevery2seconds.Themobilephone searchesforthepairingname,clicktoconnect,successConnectionwillbeep 来电接听 answerthecall 来电时,连续触摸两下耳机(L)或耳机((R)即可接听电话,伴有"嘟"提示音 Whenthereisanincomingcall,touchtheearphone(L)orearphone((R)twiceinsuccessionto answerthecall,accompaniedbya"beep"tone 来电拒接 callrejection 来电时,长触耳机(L)或耳机(R)2秒即可拒接来电,伴有"嘟"提示音 Whenthereisanincomingcall,longtouchtheearphone(L)orearphone(R)for2secondsto rejectthecall,accompaniedbya"beep"tone 挂断电话 hangupthephone 通话中,连续触摸两下耳机(L)或耳机(R)即可挂断电话,伴有"嘟"提示音 Duringacall,touchtheearphone(L)orearphone(R)twiceinsuccessiontohangupthecall, accompaniedbya"beep"tone 音乐播放/暂停耳机处于播放音乐状态时,连续触摸两下耳机(L)或耳机((R)可实现歌曲暂停,重复操作可实现歌曲播放 7/13 Musicplay/pauseWhentheheadsetisplayingmusic,touchtheheadset(L)orheadset((R)twiceinarowto pausethesong,andrepeattheoperationtoplaythesong 降噪模式/通透模式 Noisereduction mode/transparency mode 耳机首次开机为普通模式,长触耳机(L)或耳机(R)2秒开启降噪,伴有提示音.(顺序为降噪模式,再长 按进入通透模式,再长按又进入降噪模式,依次循环) Whentheheadsetisturnedonforthefirsttime,itisinnormalmode.Longtouchtheheadset (L)orheadset(R)for2secondstoturnonnoisereduction,accompaniedbyaprompttone. Noisemode,cycleinturn) 关闭降噪 Turnoffnoise reduction 四触耳机(R)关闭降噪,伴有提示音 Four-touchearphones(R)turnoffnoisereduction,accompaniedbyabeep 自动回连 Automatically connectback 开机后,耳机会先主动回连最后配对过的一台设备 Afterpoweringon,theheadsetwillfirstactivelyreconnecttothelastpaireddevice 游戏模式待机/音乐状态时,四触耳机(L)开启游戏模式,伴有提示音,重复操作关闭游戏模式 8/13 gamemodeInstandby/musicstate,thefour-touchheadset(L)turnsonthegamemode,accompaniedby apromptsound,repeattheoperationtoturnoffthegamemode 上一曲 previouspiece 三触耳机(L) Three-touchearphone(L) 下一曲 nexttrack 三触耳机(R) Three-touchearphone(R) 手动开机 Manualboot 长按3秒 Pressandholdfor3seconds 手动关机 Manualshutdown 长按8秒 Pressandholdfor8seconds IOS电池电量显示 IOSbatterylevel display 连接IOS系统后可显示耳机电池电量 ThebatteryleveloftheheadsetcanbedisplayedafterconnectingtotheIOSsystem 恢复出厂模式开机状态下,六触耳机(L)和耳机((R),耳机会关机 9/13 resetInthepower-onstate,thesix-touchearphone(L)andearphone((R),theearphonewillbe turnedoff LED显示状态 LEDdisplay status 开机配对 Poweronpairing 主耳白色LED快闪,副耳LED灯每2秒闪烁一次 ThewhiteLEDofthemainearflashesquickly,andtheLEDlightoftheauxiliaryearflashes onceevery2seconds 已连接待机 connectedstandby 主副耳机LED每5秒闪烁一次 ThemainandauxiliaryearphoneLEDsflashevery5seconds 通话中 calling LED熄灭 LEDoff 听音乐 listentomusic LED熄灭 LEDoff 10/13 充电中 charging 白色…

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Cover Letter(s)

HIFIMAN KUNSHAN TECHNOLOGY GROUP CO., LTD No.2001 Yingbin West Road Bacheng Town Kunshan city Jiangsu Province, China Agent Authorization Company: HIFIMAN KUNSHAN TECHNOLOGY GROUP CO., LTD Address: No.2001 Yingbin West Road Bacheng Town Kunshan city Jiangsu Province, China Product Name: True Wireless Stereo Earphones Model Number(s): TWS888 Product Description: True Wireless Stereo Earphones We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Jun. 21, 2023 Name: Yuchun Zhang Title: Manager Company: HIFIMAN KUNSHAN TECHNOLOGY GROUP CO., LTD

External Photos

Report No.: AGC15526230301AP03 Page 1 of 4 EXTERNAL PHOTOS ALL VIEW OF EUT TOP VIEW OF EUT Report No.: AGC15526230301AP03 Page 2 of 4 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC15526230301AP03 Page 3 of 4 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC15526230301AP03 Page 4 of 4 RIGHT VIEW OF EUT ****************************************End of Report*************************************

ID Label/Location Info

FCC ID Label Location The product does not have enough space to place the label, and FCC ID label is reflected in the user manual and package, as below:

Internal Photos

Report No.: AGC15526230301AP03 Page 1 of 3 INTERNAL PHOTOS OPEN VIEW OF EUT BATTERY VIEW OF EUT Report No.: AGC15526230301AP03 Page 2 of 3 INTERNAL VIEW OF EUT (FIGURE 1) INTERNAL VIEW OF EUT (FIGURE 2) Report No.: AGC15526230301AP03 Page 3 of 3 INTERNAL VIEW OF EUT (FIGURE 3) INTERNAL VIEW OF EUT (FIGURE 4) ****************************************End of Report************************************* BT Antenna BT Antenna

RF Exposure Info

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION FCC ID 2BALT-TWS888 Product Description True Wireless Stereo Earphones Model Name TWS888 Frequency Band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Bluetooth: 2.402GHz ~ 2.480GHz Others Device Category Portable (<20cm separation) Mobile (>20cm separation) Others: Antenna Diversity Single antenna Multiple antennas Max. Output Power Right headset:2.138dBm (Max) Left headset:1.074dBm (Max) Antenna Designation Monopole Antenna Antenna Gain 0.76dBi Minimum Assessment Distance 5mm Evaluation Applied MPE Evaluation SAR Evaluation Evaluation Result Pass 2. PORTABLE DEVICE EVALUATION METHOD AND LIMIT Following FCC KDB 447498 D01 “General SAR test exclusion guidance” The corresponding SAR Exclusion Threshold condition, listed below: 1) The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] [if(GHz)] s 3.0 for 1-g SAR and ≤7.5 for 10-g 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 ≤50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 2) At 100 MHz to 6 GHz and for test separation distances > 50 mm, the SAR test exclusion threshold is determined according to the following: a) [Threshold at 50 mm in step 1) + (test separation distance - 50mm) ( f(MHz)/150)] mW, at 100MHz to 1500 MHz; b) [Threshold at 50 mm in step 1) + (test separation distance - 50 mm)-10] mW at > 1500 MHz and ≤6 GHz; 3) At frequencies below 100 MHz, the following may be considered for SAR test exclusion. a) The threshold at the corresponding test separation distance at 100 MHz in step 2) is multiplied by [1 + log(100/f(MHz))] for test separation distances > 50 mm and < 200 mm. b) The threshold determined by the equation in a) for 50 mm and 100 MHz is multiplied by 1/2 for test separation distances ≤50 mm. c) SAR measurement procedures are not established below 100 MHz. When SAR test exclusion cannot be applied, a KDB inquiry is required to determine SAR evaluation requirements for any test results to be acceptable. 3. MOBILE DEVICE EVALUATION METHOD AND LIMIT Human exposure to RF emissions from mobile devices (47 CFR §2.1091) may be evaluated based on the MPE limits adopted by the FCC for electric and magnetic field strength and/or power density, as appropriate, since exposures are assumed to occur at distances of 20 cm or more from persons. LIMITS FOR GENERAL POPULATION / UNCONTROLLED EXPOSURE Frequency Range (MHz) E-field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Time |E| 2 , |H| 2 or S (Minutes) 0.3 -- 1.34 614 1.63 (100)* 30 1.34 -- 30 824/f 2.19/f (180/f 2 )* 30 30 -- 300 27.5 0.073 0.2 30 300 -- 1500 -- -- f/1500 30 1500 -- 100,000 -- -- 1.0 30 *Note: 1. f= Frequency in MHz * Plane-wave Equivalent Power Density 2. The averaging time for General Population/Uncontrolled exposure to fixed transmitters is not applicable for mobile and portable transmitters. See 47 CFR §§2.1091 and 2.1093 on source-based time-averaging requirement for mobile and portable transmitters. S=PG/4πR² Where: S=power density P=power input to antenna G=power gain of the antenna in the direction of interest relative to an isotropic radiator R=distance to the center of radiation of the antenna 4. MEASUREMENT RESULT Test Mode Channel Frequency (MHz) Max Output power (dBm) Max Output power (mW) Calculati on Value (Note 1) Threshold Value π /4-DQPSK BT_EDR 2402 2.138 1.636 0.507 3.0 BT_EDR 2441 1.078 1.282 0.400 3.0 BT_EDR 2480 0.149 1.035 0.325 3.0 π /4-DQPSK BT_EDR 2402 1.074 1.281 0.397 3.0 BT_EDR 2441 0.430 1.104 0.344 3.0 BT_EDR 2480 -0.183 0.959 0.301 3.0 Note 1: Calculation Value =[(max. power of channel, mW)/(min. test separation distance, mm)] ·[√f(GHz)]. Fox example: 1.636/5*√2.402=0.507 ≤ 3.0 According to KDB447498 D01 V06, threshold at which no SAR required is ≤3.0 for 1-g SAR, separation distance is 5mm, and no simultaneous SAR measurement is required. 5. CONCLUSION Since Source-base time average power is below SAR test exclusion power thresholds, the SAR evaluation is not required.

Test Report

深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 1 Version:1.0 . 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.,LTD 承 认 书 SPECIFICATION FOR APPROVL 客 户: CUSTOMER: 乐迈ROMAN 客 户 编 号: CUSTOMER P/N: T208X-BT8926B 本 厂 编 号: OUR MODEL NO: ATN1265 规 格: SPECIFICATIONS: 2.4G-2.48G FPC antenna 样 品 数: Q’TY: 1 SET 日 期: DATE: 2021.09.07 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.,LTD 客户CUSTOMER 工程 Engineering 品保 Quality 核准 Approved 工程 Engineering 品保 Quality 核准 Approved 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 2 Version:1.0 Table of contents cover .................................... 1 contents .................................... 2 一、Test Equipment .................................... 3 二、Product Specifications .................................... 4 三、matching circuit .................................... 4 四、performance test data .................................... 5 五、Environmental treatment .................................... 7 六、blueprint .................................... 8 七、Packing .................................... 9 change log Issue/Change Date Reason for change change content Version Remark 2021.09.07 new release new release V1.0 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 3 Version:1.0 一、Test Equipment 1.Network Analyzers Agilent Technologies E5071B 2.Communications Test Set CMW500 3.3D Chanber Test System 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 4 Version:1.0 二、Product Specifications 1、Material&Mechanical Characteristics Material FPC Dimension mm 2、storage and use temperature Operation Temperature -20°C~+80°C Storage Temperature -20°C~+80°C 三、matching circuit 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 5 Version:1.0 四、pe rformance test data 4.1 S11 Parameter 4.2 Gain & Efficiency 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 6 Version:1.0 4.3 Radiation pattern 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 7 Version:1.0 4.4 OTA test data 4.5 actual data 五、Environmental treatment 1 无 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 8 Version:1.0 六、blueprint 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 9 Version:1.0 七、Packing 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Product packaging Product name:T208X version:V1.0 page:1/1 1.The release paper compartment is placed to protect the antenna 2.Sealing bag packaging effect 3.Carton sealing effect (with shipping labels and ROHS labels) Produced by: Liu Zilong

Test Report

深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 1 Version:1.0 . 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.,LTD 承 认 书 SPECIFICATION FOR APPROVL 客 户: CUSTOMER: 乐迈ROMAN 客 户 编 号: CUSTOMER P/N: T208X-BT8926B 本 厂 编 号: OUR MODEL NO: ATN1265 规 格: SPECIFICATIONS: 2.4G-2.48G FPC antenna 样 品 数: Q’TY: 1 SET 日 期: DATE: 2021.09.07 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.,LTD 客户CUSTOMER 工程 Engineering 品保 Quality 核准 Approved 工程 Engineering 品保 Quality 核准 Approved 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 2 Version:1.0 Table of contents cover .................................... 1 contents .................................... 2 一、Test Equipment .................................... 3 二、Product Specifications .................................... 4 三、matching circuit .................................... 4 四、performance test data .................................... 5 五、Environmental treatment .................................... 7 六、blueprint .................................... 8 七、Packing .................................... 9 change log Issue/Change Date Reason for change change content Version Remark 2021.09.07 new release new release V1.0 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 3 Version:1.0 一、Test Equipment 1.Network Analyzers Agilent Technologies E5071B 2.Communications Test Set CMW500 3.3D Chanber Test System 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 4 Version:1.0 二、Product Specifications 1、Material&Mechanical Characteristics Material FPC Dimension mm 2、storage and use temperature Operation Temperature -20°C~+80°C Storage Temperature -20°C~+80°C 三、matching circuit 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 5 Version:1.0 四、pe rformance test data 4.1 S11 Parameter 4.2 Gain & Efficiency 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 6 Version:1.0 4.3 Radiation pattern 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 7 Version:1.0 4.4 OTA test data 4.5 actual data 五、Environmental treatment 1 无 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 8 Version:1.0 六、blueprint 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Page 9 Version:1.0 七、Packing 深圳市艾特诺通讯设备有限公司 SHENZHEN ATN COMMUNICATION EQUIPMENT CO.LTD Product packaging Product name:T208X version:V1.0 page:1/1 1.The release paper compartment is placed to protect the antenna 2.Sealing bag packaging effect 3.Carton sealing effect (with shipping labels and ROHS labels) Produced by: Liu Zilong

Test Report

Page 1 of 62 FCC Test Report Report No.: AGC15526230301FE03 FCC ID : 2BALT-TWS888 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : True Wireless Stereo Earphones BRAND NAME : HIFIMAN MODEL NAME : TWS888 APPLICANT : HIFIMAN KUNSHAN TECHNOLOGY GROUP CO., LTD DATE OF ISSUE : Apr. 11, 2023 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC15526230301FE03 Page 2 of 62 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Apr. 11, 2023 Valid Initial Release Report No.: AGC15526230301FE03 Page 3 of 62 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ....................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH .............................................................................................................. 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ......................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ......................................................... 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................... 8 2.7. TEST METHODOLOGY ............................................................................................................................. 8 2.8. SPECIAL ACCESSORIES ......................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS ................................................................................................................. 8 2.10. ANTENNA REQUIREMENT..................................................................................................................... 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 9 4. DESCRIPTION OF TEST MODES ................................................................................................................. 10 5. SYSTEM TEST CONFIGURATION ................................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM ....................................................................................................... 11 5.2. EQUIPMENT USED IN TESTED SYSTEM ............................................................................................... 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................... 11 6. TEST FACILITY .............................................................................................................................................. 12 7. PEAK OUTPUT POWER ................................................................................................................................ 13 7.1. MEASUREMENT PROCEDURE ............................................................................................................. 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT .................................................................................................. 14 8. 20DB BANDWIDTH ........................................................................................................................................ 22 8.1. MEASUREMENT PROCEDURE ............................................................................................................. 22 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 22 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 23 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 27 9.1. MEASUREMENT PROCEDURE ............................................................................................................. 27 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 27 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 27 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 27 10. RADIATED EMISSION ................................................................................................................................. 41 Report No.: AGC15526230301FE03 Page 4 of 62 10.1. MEASUREMENT PROCEDURE ........................................................................................................... 41 10.2. TEST SETUP ......................................................................................................................................... 43 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 44 10.4. TEST RESULT........................................................................................................................................ 44 11. NUMBER OF HOPPING FREQUENCY .............................................…

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Test Setup Photos

Report No.: AGC15526230301AP02 Page 1 of 2 TEST SETUP PHOTOS RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC15526230301AP02 Page 2 of 2 RF CONDUCTED TES SETUP ****************************************End of Report*************************************

Contact Information

Applicant

Yuchun Zhang(Manager)
[email protected]15995644514Fax: 15995644514

Technical Contact

HIFIMAN KUNSHAN TECHNOLOGY GROUP CO., LTD
[email protected]

China

Test Firm

Attestation of Global Compliance (Shenzhen) Co., LDoris Li
[email protected]+86-755-25234088

Technical Specifications

#Rule PartsFrequency RangePower Output
115C2.40 GHz - 2.48 GHz1.60 mW
Confidentiality
Long Term
Grant Notes
Power listed is the maximum conducted output power.