Specifications built in Stereo MP3 player Bulit-in FM,MIC Support MP3 Micro SD card Built-in rechargeable battery Micro SD FM Mic Stereo MP3 headset bluetoothSpecification of bluetooth:Operation distance:10m.Range of frequency:2.4-2.4835GHz ISM bandSensitivity:-85dbSpecification of MP3/FMPC interface USB 2.0Music format:MP3/WMATF card support:128M-32GBFM frequency response:87.5-108MHZRechargeable lithium battery:350mAhSpecification of headphoneType:stereo headphone with MicSpeaker:OD 40mmSensitivity:115db S.P.L. at 1KHZImpedence:32 ohmFrequency response:20HZ-20KHZRated power:40mwPower capacity:100mwMicphone Unit:4.5mmx2Line in Plug type:OD 3.5mm stereo audioFeatures:Allow you to enjoy digital quality music wirelessly and connect between music and phone calling freely.Support TF cardSupport FM high quality stereo audioSupport bluetooth stereo devices to receive A2DP stereo music from laptop,computer,tablet PC,Iphone,blackberry, MP3 player or any other device that supports bluetooth ste
Brand Name: USBNOVEL Model Number: UST-BHF22 Style: In-Ear,In-ear Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Usage: Mobile Phone Specifications bluetooth hand free,bluetooth headset,bluetooth earphone bluetooth hand free,bluetooth headset,bluetooth earphone Description:- Technology: Bluetooth version V2.0 + EDR. Transmission Products: 10 m Support for Bluetooth headsets, hands-free, A2DP and AVRCP functions Size: 55mm x 24mm x 27mm. Weight of the product: about 20.1 grams Call Time: 6 hours standby time: 150 hours. Charging time: 3 hours Audio: stereo
Specifications 1.2012 Hotest Fashionable Wireless Stereo Audio Bluetooth Headphone 2.OEM/ODM welcome. 3.Best price and timely service Hotest Fashionable Wireless Stereo Audio Bluetooth Headphone,OEM/ODM welcome Bluetooth Chip: CSR BC57E
Brand Name: JT Bluetooth headphone Model Number: JT-2830- Bluetooth headphone Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: Any color Weight: 144g Music Formats: MP3, WAV, WMA Type: Bluetooth headphone Plug Type: 3.7V 180mAh Music player time: 8 hours Battery: USB 350mA/h Packing: Color box Qty/ctn: 40pcs/ctn Ctn size: 46x 40 x 38cm Packaging & Delivery Packaging Detail: Bluetooth headphone Packing : Color box(14.5x 12 x8.5cm) ; 40pcs/ctn ; 46x 40 x 38cm; 9.8kgs/8.8kgs Delivery Detail: 20 days-Bluetooth headphone Specifications 1.Bluetooth headphone 2.Sensitivity micro bluetooth headphone 3.Best price,good quality,newest 4.Noise cancelling headphone Bluetooth headphone for music wirelessly JT-2830 BLUETOOTH HANDPHONE FEATURE : 1) Sensitivity micro bluetooth headphone2) Easily charge via USB port3) Accept incoming calls or toggle betw
Specifications Mono Bluetooth Headset with 3 Hours Continual Talking 1. High Quality with Retail Package. 2. Good Price 3.Universal using Features: Bluetooth Core: V2.0Bluetooth Profile: 1.1/1.2/2.0+EDRStandby time: ≥ 36hoursTalk time: 3 hoursCharging Time: 2-3 hourStandby Current: 0.7-1mABatery Capacity: 30mA/hWireless Frequency Range: 2.4GTransmission Power: 0 dbmTransmission Distance: 10MEnvironment Temperature: -20/+60 °COperating Voltage:3.7VAdjustable volume Details: NameMono Bluetooth Headset with 3 Hours Continual TalkingMaterialHigh quality ColorBlackDelivery timeFast delivery,within 3-7 daysMOQGoods on handsSamplesOEM is availableDescription1. Made of good quality material2. Popular beautiful grid design 3. Various colors available 4. easy to install5. Delivery fast & Good servicePackingPE Bag,then in carton,carton size:60*39*45cm
Brand Name: vakind Model Number: 3131 Style: In-Ear Communication: Wired Connectors: Other Use: Portable Media Player Function: Bluetooth Place of Origin: Guangdong China (Mainland) color: Black Packaging & Delivery Packaging Detail: air bag. Delivery Detail: 3-7 days after payment Specifications BCK08 Slim A2DP Stereo universal Bluetooth Headset new Wireless frequency: 2.4GHZ-2.48GHZ Transmission range: 6 - 10 m BCK08 Slim A2DP Stereo universal Bluetooth Headset newBrand new Bluetooth V2.0 stereo headset! Suitable for all Bluetooth V2.0 enabled mobile phones, PDA, PC, etc. Ultra fashionable design, small size and light weight Proper design, wear comfortably Advanced technology of echo elimination and noise reduction, provides perfect sound quality Including stereo earphones and single earphone, wirelessly listen to the music from mobile phone and PC, enjoy the music as much as you like Multifunctional single key operation, easy to control Separate volume
Specifications bluetooth headphone 1.earphone for mp3 ipod iphone 2.novelty earphone headphone 3.passed CE&Rohs,PAHs 4.flat cable blue 2013 Wireless stereo studio Headphone retractable Silent disco colorful with mic factory price very cheap About us: Shenzhen Dayixin Technology Co., Ltd, established in 2007, specialized in developing and manufacturing various types of headphones, earphones, mini speakers and Microphones. Our office is located in Songgang Town of Shenzhen with convenient transportation and fast market information, we provide high-quality and competitive price products. Our Main lines: wireless headphones, Bluetooth Headsets, Stereo Headphones, computer headphones, mp3 earphones, mobile earphones, retractable earphones, mini speakers, bag speakers and Microphones ect... Shenzhen Dayixin Technology Co., Ltd. consists of two economic entities approved by the government, which are Shenzhen Dayixi
Specifications 1. Stereo bluetooth headset headphone 2.MOQ: 10PCS 3.A gift box, 4.Color:red,white,black,blue 5. Fast Delivery YPWH-C0116 universal stereo bluetooth headset SPECIFICATION Quiescent Current: 10UAOperating Current: 30mAOperating voltage: 4.2VCharging current: 30mA-150mA (LED red light indicates)Maximum output power: L 20mw R 20mwBattery capacity: 330mAH 3.7VCharging time: 3 hoursContinuous working time: 8 hoursBattery life: charge and discharge ≥ 300 timesThe open accessible under effective distance ≥ 10M Bluetooth receiver Effective distance:Input voltage: DC 5V/200mA connected to the computer USB interfaceStandby time: 30 hoursOutput power class: Class 2Support V2.1 + EDR version Bluetooth specification Size: 170 * 70 * 50mm PRODUCT PICTURE , PACKAGING COMPANY PROFILE Yinphone accessories Inc. has bee
Specifications Mini Bluetooth Headphone SX-905 1) High Quality 2) Nice Design 3) Fast Shipment 4) OEM Mini Bluetooth Headphone SX-905 Unit Dimensions: 14.5/12.5/2.5cm weight: 130g Bluetooth Version: V1.2/V2.0 Charge Time: about 3hours Talk Time: 12hours Transmission Distance: Up yo 10M Package: 1xSX-905,1xcharger,1xUser manual
Brand Name: Jedel Model Number: JD-H2100 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Noise Cancelling Place of Origin: Guangdong China (Mainland) COLRO: BLACK , WHITE, PINK , BLU Packaging & Delivery Packaging Detail: gift box Delivery Detail: 20~25days Specifications sport SD card headphone with FM radio 1.nice design with good quality 2.Sound processor enhances musical and call clarity Description:Sports Running Wireless Handsfree Headset Headphone Earphone Micro SD TF Card Slot MP3 Music PlayerThe wire free head-loop Mp3 player is especially designed for sport lovers. Incorporating the behind-the-neck, over-the-ears design, this headset is extremely comfortable and secure for the most users: bicyclist, runners, joggers, walkers etc.With its fashinable appearance and built-in MP3(&WMA) player with HIFI Stereo earphones (soud output up till 85dB), you can always enjoy high quality music.Features:A stylish, great-sounding headphon
Brand Name: MEW Model Number: WH-002 Style: Ear Hook Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) OEM: highly welcomed MOQ: 100 pcs Fuctiion: waterproof,bluetooth,noise cancelling microphone: YES League offer download: YES MP3 WMA: YES Memory power: YES Cable headset: YES Packaging & Delivery Packaging Detail: Product size:18.5*16*7cm Packing size:19*16.5*7.5cm Delivery Detail: within 3-6 days after payment arrived Specifications bluetooth headphone 1.put TF card play music directly 2.automatic FM radio function 3.colors: black. White. Red. Blue. Purple Wireless Waterproof headphones adapter1) Put TF card play music directly, and support for multiple audio format: WMA MP3... 2) Automatic FM radio function3) Recording function (according to the customization)4) Support cable headset heard that function, with a microphone5) Without electricity songs, radio memory functions6)
Brand Name: moshiny Style: Ear Hook Communication: Wired Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: red,blue,yellow,orange,pink,white etc type: various powered: 2AAA batteries dimensions: 10.8 x 3.3 x 7.2 inches Packaging & Delivery Packaging Detail: Original Box and contents,polybag,color box and gift box,also customized package Delivery Detail: 2-5 workdays Specifications bluetooth headphone Its all about sound Less Noise, more music with powered isolation comfort your ears good for iphone AAA quality syllable wireless bluetooth headphone , bluetooth headphone , AAA quality bluetooth headphone , wireless bluetooth headphone headphones technical Details(1)Advanced driver design for precise audio clarity (2)Extra large speaker drivers for super deep bass (3)High powered digital amplifier plays hip hop, rock, R+B and mo
Specifications Hottest Foldable High Quality Music Stereo Bluetooth Headset *Elegant Fashion Design *High Acoustic Fidelity *CE/RoHS/BQB/FCC Hottest Foldable High Quality Music Stereo Bluetooth Headset Specification: G3S is the most popular Stereo bluetooth headset with elegant fashion design, many colors available as well as the high quality. Bluetooth Version2.1 with EDROperating Distance10mBatteryBattery Built-in rechargeable li-on polymer batteryTransmission powerclass 2Charging PlugA/C chargerMusic StreamingYesMulti-function Button On/OffYesStandard Bluetooth FeaturesYesStandby Time (hrs)240Talk Time (hrs)21Charging Time(hrs)5Charger PowerInput 110-240 V AC, Output : 5V DCSupported ProfilesHeadset A2DP,AVRCP,HandsfreeIn the Box1 bluetooth headset1 User manual1 AC charger Notes: Warranty :1 yearMOQ for cu
Brand Name: ODM,ODM Model Number: BT-2 Style: Headband Communication: Wireless Connectors: USB Use: computer ,mobile phone ,music Function: Bluetooth Place of Origin: Guangdong China (Mainland) Supports: Bluetooth Headset, Handsfree, A2DP and AVRCP Profiles Standby time: up to 200 hours Battery: 3.7V 300mA Rechargeable Li-Polymer 3.7V 300mA Rechargeable Li-Polymer: Imput AC 100-240V, output DC 5V 300mA Specifications 1. Bluetooth Version: V2.1 EDR 2.Type: Stereo headphone with internal mic 3. Operation Distance: 10 m bluetooth stereo headphone balck color , wireless blue headphone for presonal at home & school. Specifications of bluetooth: Bluetooth VersionV2.1 EDRTypeStereo headphone with internal micOperation Distance10mRange of Frequency2.4 to 2.4835GHz ISM bandSensitivity85dBPC InterfaceUSB2.0Music FormatMP3 at WMAStandby timeup to 200 hoursMusic Playing Time7 hoursNormal Charging TimeWithin 3 hoursBattery3.7V 300mA Rechargeable Li-PolymerPowerImput
Specifications Product name:Universal Mobile phone wireless Wireless Bluetooth Headset Earphone Headphone Product name:Universal Mobile phone wireless Wireless Bluetooth Headset Earphone Headphone100% Brand New.100% Brand New.Small size, light weight and comfortable to useSingle-button interface and separated volume control buttonsAdvanced technology, provides perfect sound qualityStores and charges simultaneously with the Bluetooth charging caseSuitable for all Bluetooth enabled devices like mobile phones, iPhone, PS3, PDA, and so on.input :100-240Vwe only offer us plug about Power Supply's plugSpecifications: Product name:H-200 Bluetooth HeadsetWeight:74gDimensions:approx.4.1 x 1.8 x 2.2cmBluetooth specification:Version 2.0, Class2Bluetooth Profile Supported:Headset , HandsfreeRange of Frequency:2.402 to 2.480GHz SpectrumTalk Time:up to 4 hoursStandby time:up to 120 hoursNominal Charging Time:With 3 hours
Specifications Bling bling earphone/bluetooth headsets 1.Good quality with reasonable price 2.High Acoustic Fidelity Bling bling earphone/ bluetooth headsets Namebling bluetooth headsetsFrequency Response20Hz-20KHzSensitivity108dB±3dB S.P.L at 1kHzImpedance32ohm±10%Plug Type3.5mmOutput10MWDiamondSwarovskiDiamond Size3.0mm /SS12Weight150g/PCLogoCan be PritedPacking1pc in a OPP bagMOQ1200 PCSample day5-7DaysDelivery day15-30Days more details about the earphone .....this way pls!!!
Specifications wireless/wired 2 in one flexible foldable multi bluetooth headphone for cellphone/iphone/ipod *2 in one flexible design *Wirel wireless/wired 2 in one flexible foldable multi bluetooth headphone for cellphone/iphone/ipod As you see,this bluetooth stereo headset is producted with a high quality and cool apearence.Even better,the type of headset has powerful function,which can make you enjoy music you like with high stereo fidelity effect,what'more,it comes with a built-in microphone,that can make you communicate with your friend wirelessly.Now start to enjoy your life and job with the bluetooth 2ch. Features:Bluetooth wireless headphoneThe built-in microphone and call-forwarding functionRemote control the function of PAUSE/PLAYRemote control last/next songAdding and connecting your bluethooth devices immediatelyControlling answer calling and reject callingControlling volume up and volume down Specification:colour:white, red, yellow, blue, black, pink, orang
Brand Name: QR Model Number: QR-C918 Style: Headband Communication: Wireless Connectors: USB Use: mobile phone, Laptop, PC, & PSP , Table etc. Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: Blue Yellow Red Pink White Black Packaging & Delivery Packaging Detail: 1pc/strong blister box, 500 pcs/ctn Customized welcome Delivery Detail: 1pc/strong blister box, 500 pcs/ctn Customized welcome Specifications wireless headphones wireless headset stereo bluetooth headphone wireless headphones wireless headset stereo bluetooth headphone Specifications: 1)Bluetooth headphone lets you listen to music or take phone calls wirelessly2)High-quality speakers deliver crisp,rich sound.3)Accept incoming calls or toggle between tracks with the touch of a button4)Lightweight,comfortable design for all-day listening, headphone string retractable5)Compatible with bluetooth enabled devices,such as most computers,&
Brand Name: HAPOW Model Number: HS-BSH558 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: White, Black Bluetooth version: Bluetooth 4.0 Chipset: CSR BC8645 Talk time: Up to 4 hours Standby time: Up to 100 hours display: iPhone status indication Weight: about 180 grams Dimensions: 18*17*5.8cm Specifications NFC bluetooth headphones 1: NFC function 2.Humanized voice ON/OFF 3.bluetooth 4.0 NFC bluetooth headphones bluetooth 4.0 Headset ;wireless headset; bluetooth stereo headset Features: *Bluetooth Stereo Headset (add NFC fuction) *Built-in APTX, AAC professional decoding Support virtual 3D surround sound In connection with the Apple computer , can support APTX, to enjoy better sound quality with Apple. *Supp
Specifications Double Mic Noise Cancellation Bluetooth Headset high quality.pretty bluetooth headset Suitable for one or two earsAdopt the most advanced dual-Mic noise cancellation tech to stop any interference, ensure all conversations can be free from obstruction.DSP for crystal sound qualityComfortable for all day useHigh performance with Bluetooth 2.1 EDR techBattery indicatorRadius of transmission-10 metersspecification:Chipset:CSR BC5 V2.1Support:A2DP,AVRCP,Headset,Headfree,Noise-Canceling,Voice-Dial/MuteBroadcast Range:10MTalking Time:4 hoursStand-by time:100 hoursColor: BlackNet weight:10gPackage includes:1 X bluetooth headset1 X power charger1 X ear hook1 X English manual
Specifications 1.Bluetooth stereo headphone 2.Competitive price 3.Wanderful sound quality Bluetooth Version :ISSC 3.0+EDRType:Stereo headphone with internal micOperation Distance:10mRange of Frequency: 2.4 to 2.4835GHz ISM band Sensitivity:85dB Music Format MP3 at WMAStandby time up to 160hours Music Playing Time 5 hours Normal Charging Time Within 3 hours Battery 3.7V 200mA Rechargeable Li-Polymer RF Output Power -6dBm to 4dBm Operating temperature -10’C to +55’CSupports Bluetooth Headset, Handsfree, A2DP and AVRCP Profiles Kingsun: China supply chain solution Whatever you need, youcould find the solution from kingsun Since its establishment in 1995, Shenzhen Kingsun Enterprises Co., Ltd has been expanding its business fields globally and continuously growing up towards another milestone. With 10 professional product developing engineers, Kingsunprovides OEM & ODM service to clients all over the world, optimize the
Specifications 1.Universal Bluetooth Headphone for iPhone 5 Samsung Galaxy Note 2 N7100 2.All Tested, Packed Carefully 3.Fast Delivery Notice:You can buy a sample conveniently on our website vococal.com :http://www.vococal.com/_p12683.htmlFree Shipping with Tracking#, Support Dropship!Offer Tracking Update Notification Service ---- Help You Track The Package! Description: Details: Features:Universal Bluetooth Wireless Stereo Headphone Earphone HeadsetNo wire needed,Dual-channel,StereoBuilt in Microphone for Hands free cell phone useFunction:volume control,answer/hang up,control music playback/forward to the next song,etcHands free headset for the device within the transmission distanceStylish and fashion design to fit the deviceHigh sound qualitySpecification:Version:V3.0Talk time: 11 hoursStandby time: 210 hoursCharging time: 2 hoursTransmission distance: PowerClass2-10mSupport Protocol: Headset, Hands-free, A2DP, AVRCPWearing styles: headbandBattery:200mA Rechargea
Brand Name: BLUETIGER Model Number: SK-BH-M8 Style: Headband,Head Wearing Communication: Wireless Connectors: USB Use: Computer Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Certification: BQB,FCC,CE,ROHS Packaging & Delivery Packaging Detail: blister card Delivery Detail: 1000pcs around 15 days Specifications HI-FI Computer Bluetooth Headphone Bluetooth Headset v2.0, A2DP Compatible, Over-the-Head Headband, Noise-Canceling Microphone, HI-FI Computer Bluetooth Headphone Designed for an active lifestyle ,BH-M8 HI-FI Bluetooth Stereo Headset combines the stylish design and reliable wireless technology in the ideal mini size units .It’s completely meet the requirement of fashion life . Features:1). Text to speech2). Multipoint Support; 2 Connections Simultaneously3). Build in CVC to eliminate noise and control echo very well and get clear speaking effect;4). Crystal clear sound with DSP5). Compatible with Bluetooth enabled device
Specifications 1.Bluetooth 3.0 2.Built-in rechargeable li-on polymer battery 3.12 Hours long talk time 4.Headband design Specifications Bluetooth Version: V3.0 with EDR Operating Distance: 15m Battery: Built-in rechargeable li-on polymer battery Charging Plug:A/C charger Dimensions:150mm*140mm*40mm Headset Weight:Around 69 g VOIP:Support Multipoint Technology:No Music Streaming:Yes Multi-function Button On/Off:Yes Standard Bluetooth Features:Yes
Specifications 1.charming stereo wireless headset 2.CE & ROHS 3.Fast delivery 4.Bluetooth Program:ISSC+Class2 5. bluetooth headphone charming stereo wireless headset, bluetooth headphone Product Discription: Bluetooth Core: V2.1+EDR Bluetooth Program:ISSC+Class2Standby time: ≥ 100hoursTalk time: 6hoursCharging Time: 2-3 hour Standby Current: 0.7-1mABatery Capacity: 48mA/hWireless Frequency Range: 2.4GTransmission Power: 0 dbmTransmission Distance: 10MEnvironment Temperature: -20/+60 °COperating Voltage:3.7V More tips: Bluetooth is a radio technology developed to deliver short-range wireless mobility. It eliminates the physical wires between the high technology devices such as mobile phones.Most advanced Mini Bluetooth Headset with length 29.4mm & weight 6.8g only. Up to 5.5hrs talk time & 10m range allows you talk anytime freely.Bluetooth Headset works up to 15m allows you talking everywhere. All phone calls are connected wireles
Brand Name: USBONLINE Model Number: USWH0019 Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth Place of Origin: Guangdong China (Mainland) Color: Grey Packaging & Delivery Packaging Detail: Gift box/ OEM Delivery Detail: 2 to 7 days when confirm the order Specifications Best wireless bluetooth headphones 1 SD card wireless music headphones 2 Two year warranty 3 Excellent experience Best wireless bluetooth headphones SD card wireless music headphonesFetures:1.Advance wireless music headsets provide portable,3D sound and high-quality of subwoofer enjoyment.2.No need to connect any cable and just simply insert the SD card,you can play your favorite music.
Specifications Wireless bluetooth headphones with Mic for laptop/ PC Best service and qulity Small MOQ Wireless bluetooth headphones with Mic for laptop/ PC P-HEADPHONE013
Brand Name: Willong Model Number: EAR0764 Style: In-Ear Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: white type: bluetooth Packaging & Delivery Packaging Detail: 1pc/PE bag paper case /plastic case Delivery Detail: 3days-7days Specifications 1.divers in type:ear-bud/in ear/clip on 2.noise cancelling and stereo 3.CE/RHOS/FCC certification Bluetooth headphone willong quality worth to rely on !!! white bluetooth headphones Unique design ,best price!!!Specifications:1. Standards: Bluetooth specification V2.0/V2.1+EDR2. Radio Frequency Range:
Brand Name: www.sw-box.com Model Number: Bluetooth Headset Style: In-Ear Communication: Wireless Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) SKU: 43614 Weight: 0.246 Kg Color: Black Packaging & Delivery Packaging Detail: Poly Bag / Customized Blister / Color Box Delivery Detail: 1-5 Working Days Specifications Caller ID R5 Stereo Bluetooth Headset (Black) Caller ID Bluetooth headphone Caller ID R5 Stereo Bluetooth Headset (Black) The Bluetooth Headset allows you freedom to make and receive calls while on the move or in the office. You can connect the headset to a compatible phone that supports Bluetooth wireless technology. It allows you to connect compatible communication devieces without cables. The Stereo music Bluetooth Headset let your music accompanying, free communication. The product adopted the latest wireless bluetooth technology, it can filter and reduce various kinds of noise, make you enjoy music or stay in a noisy environment, never
Brand Name: SAWOLOL Model Number: HEP-001B Style: Neckband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: bubble bag and paper box Delivery Detail: 7-15 days after order confirmed Specifications 1. Bluetooth headphone 2. Back-neck design headphone 3. Take phones 4.Chargeable lithium battery 5. wireless Stereo Bluetooth Headphone Sports-style headphone,it's specially for your use when you are doing sports.- Back-neck, foldable design- Appliant to Version 2.0 - Transmitter Power: Class 2- Operation Distance: Within 10m- Frequency range: 2.4020-2.480GHz- Built-in rechargable Li-batteries:300mAh- Charger output Spec.: DC 5.0V(300mA)- Normal charging time: ≤3 hrs- Calling time: ≥10hrs- Music Time: ≥6hrs- Standby time: ≥135hrs- Unit dimension: 54x47x16 mm(Single Earplug) Packing:40pcs/CTN Carton Size: 52.5×24.5×41.5cmN.W.: 6