Specifications 1.Stereo bluetooth headset 2.Work frequency:2.40GHz-2.48GHz 3.Bluetooth edition:V2.1 Specification:1.Stereo bluetooth headset2.Work frequency:2.40GHz-2.48GHz3.Bluetooth edition:V2.1 4.Transmitting power: Glass25.Supports Headset & Handsfree Profiles6.Distance:10-15 meters7.Built-in chargeable 400mAH lithium battery8.Talking time: 7hours; 10.Stand-by time: 300 hours11.Connectors:3.5mm12.Chat on MSN,SKYPE,QQ in wireless Payment terms:We accept T/T,West Union,Paypal and Escrow. Warranty:We offer 1 year warranty.All our products have passed the strict QC inspection,and we warranty wewill ship out products with good quality package. Note:MOQ is set for different levels of customization based on the real situation and if you have other special requirement for OEM/ODM service,please contact us for more information.We can offer OEM service,print your LOGO on product and do your own design gift box.Welcome to contact us for more details!
Specifications 1.super stylish bluetooth headset with high quality 2:Stylish earphone housing 3:Customized color and logo print Features: 2.4GHz uncompressed sound intact 2-way transmission invisible microphone  
Brand Name: bluetooth Model Number: BH-208 Style: Neckband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: white Packaging & Delivery Packaging Detail: package Delivery Detail: 3 working days after payment Specifications stereo bluetooth headset BH-208 High quality competitive price prompt delivery stereo bluetooth headset BH-208 Basic specifications of the brand BH-208 technicalstandard Bluetooth V2.0 + EDRChipset BlueCore2-Audio single-chip Bluetooth Headset Profile Profilesupport for all major brand Bluetooth cell phone modelsfrequency of 2.4GHzwireless transmissionpower Class2 transmissionrange is about 10 meters far75 mA power supply 220V battery charger when the lithium polymer battery 2 hourstalk time 6.5 hoursStandby time 150 hoursDimensions (mm) 42 × 23 × 11Weight (g) 13.8Gemperature -15 ° C - 55 ° C
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 Bluetooth Headphone 1. Operation Distance: Within 10m 2. Frequency range: 2.4020-2.480GHz Bluetooth Headphone 1. Sports-style headphone, it's specially for your use when you are doing sports. 2. Transmitter Power: Class 23. Operation Distance: Within 10m4. Frequency range: 2.4020-2.480GHz5. Embedded rechargeable Li-batteries: 300mAh6. Charger output Spec.: DC 5.0V(300mA)7. Normal charging time: less than or equal 3 hrs8. Calling time: greater than or equal 10hrs9. Music Time: greater than or equal 6hrs10. Standby time: greater than or equal 135hrs11. Headset Size: 54X47X16 mm12. Weight: 40g±2 g13. Certificate: CE / RoHS / Bluetooth Relational Products Certificate Exhibition (2012 Taipei Computex) &nb
Specifications bluetooth headphone 1.Bluetooth stereo head set let you listen to music or phone calls wirelessly 2.High-quality speaks delive bluetooth headphone 1.Bluetooth stereo head set let you listen to music or phone calls wirelessly2.High-quality speaks deliver crisprich sound3.Accept incoming calls or toggle between tracks with the touch of a button4.Lightweight,comfortable design for all-day listening.5.Compatible with bluetooth enabled devices, such as IPHONE,IPAD,most computer,cellphones6.Frequency response:20-20,000Hz7.Speak Impedance:32 ohm8.Omni-directional high quality microphone9.Sensitivity microphone10.Transfer Distance:33FT/10M11.Frequency:2.4GHz12.Technology:Bluetooth V3.0+EDR13.Easily charge via USB port14.Play/Talk-10Hrs15.Low battery notification
Specifications wireless headphone for bluetooth headphone 1.bluetooth headphone 2.earmuff bluetooth headphone 3.factory price wireless headphone for bluetooth headphone 1.Bluetooth stereo headset lets you listen to music or phone calls wirelessly2.High-quality speakers deliver crisp,rich sound3.Accept incoming calls or toggle between tracks with the touch of a button4.Lightweight,comfortable design for all-day listening5.Compatible with bluetooth enable devices,such as for phone/for ipad,most computers,cellphone6.Frequency response:20-20,000 Hz7.Speaker impedance:32 ohm8.Transfer Distance:33 FT/10M9.Frequancy:2.4GHz10.Technology: Bluetooth V3.0-EDR11.Play/Talk ~10 Hrs12.Omni-directional high quality microphone13.Easily charge via USB port14.Sensitivity microphone Ver.Bluetooth V3.0+EDRBluetooth ProfilesHSP,HFP,A2DPK,AVRCPEffective Range10MetersMusic Time10HoursTalk Time11HoursStandby TimeUp to 250HoursInputDC:5V/180mAhCharge Time3HourDimensions14.5*10*6cm  
Specifications Specifications Fashionable stereo Bluetooth headphones 1. factory price 2. warranty: 1year 3. OEM welcomed SpecificationsFashionable stereo Bluetooth headphones 1. factory price 2. warranty: 1year 3. OEM welcomedFashionable stereo Bluetooth headphones 1. Features A two +MP3 stereo Bluetooth headset &
Specifications Noisy cancelling EVA headphone case 1.EVA is eco-friendly material 2;hard, protective and waterproof 3;utility, custom made Noisy cancelling EVA headphone case earphone winder earphone hard case earphone case white earphone pouch earphone holder earbuds small pouch bose sie2i earphone headphone case earphone organizer earphone carry case earphone case mesh EVA Case,Hard Case,EVA Headphone Case,Headset Case/Box,Earphone Case Headphone Sanitary Hairdressing Case Logic Bag Case For Mid eva case/bag detailed information:1. Material: eva +pu+fabric 2. Color: Pantone color is available3.MOQ:3000pcs4. Size: customized5. Style: designer. OEM/ODM is welcomed6. Printing logo: according to client's requirement, by silk screen printing, heat transfer printing, embossing,sublimation and offset printing7. Sawing stitching: we can make bl
Brand Name: OEM Model Number: BTK-28 Style: Headband Communication: Wireless Connectors: V4.0 Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: Black Version: V4.0 Bluetooth range: 10meters Talking time: up to 20 hours Standby time: up to 800hours Charging Time: 3-hours The unit size: 174*40.7*159.85mm Weight: 162g Operating Temperature: -10-----45 Storage Temperature: -20-----60 Packaging & Delivery Packaging Detail: gife color box packing and customer's design welcomed Delivery Detail: 20-25 days Specifications HIFI Bluetooth Headphone with built-in speaker 1.Bluetooth 4.0 2.Support A2DP/AVRCP/HFP/HSP 3.OEM is OK 4.High sound quality Model No.: BTK-28 Super high quality HIFI Bluetooth Headphone with built-in speaker Headset Overview: Specifications: 1.Bluetooth protocol standards:Bluetooth V4.02. Support Bluetooth profiles: HFP A2DP AVRCP 3.Bluetooth range:
Specifications 1)accept incoming call 2)listen perfect music 3)high quality speaker 4)omni-directional microphone Bluetooth Headset, Bluetooth Headphone stereo Frequency response: 20-20,000Hz.Speaker impedance: 32 ohm.Transfer distance: 33ft/10m.Frequency: 2.4GHz. Technology:Bluetooth V3.0-EDR. Play/talk time: approx. 10h. Features: 1)Accept incoming calls or toggle between tracks with the touch of a button.2)Bluetooth stereo headset lets you listen to music or phone calls wirelessly.3)High-quality speakers deliver crisp, rich sound.4)Compatible with Bluetooth enable devices, such as iPhone, iPad, most computers, cellphone.5)Omni-directional high quality microphone.6)Easily charge via USB port. Sensitivity microphone. Charging power supply 5V/2AWorking power +3.7 V lithium batteryOutput power 3W * 2Frequency Range 20Hz-20KHzInterface device computer / phone / Bluetooth adapterColor ImageDimensions (LxWxH) 16.5 * 14.5 * 3.2 (CM)Product Weight 115GPackage Size (LxWxH
Brand Name: LD Model Number: S69-0301 Style: Headband Communication: Wireless Connectors: USB Use: laptop,PC,Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Bluetooth Version: V2.0+EDR Class II Operating Distance: 10metres(390"inches) Supported Profiles: Headset, Handsfree, A2DP and AVRCP Profiles Frequency: 2.402-2.480GHZ GFSK light weight: 126*70*40mm,42g Packaging & Delivery Packaging Detail: standard export package Delivery Detail: prompt shipment for trial order Specifications 1.original Factory Price. 2.your music everywhere. 3.Simple design. 4.Bluetooth headphone with smart sound mini foldable Bluedi brand Wifi bluetooth headphone stereo headphone with A/C charger and USB Just for your stylish package
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 1.Newest Stereo Wireless Bluetooth Earphone/Bluetooth headphones 2.Rich color can be choose Newest Stereo Wireless Bluetooth Earphone/Bluetooth headphones--P-EARPHONE013 Specifications: Bluetooth Version: 2.1 + EDRWorking Distance : Up to 10 metersFrequency response : 20~20k(Hz)Frequency: 2.4GHz Impedance: 32Ω Battery: 3.7V 180mAh USB Input Voltage5VPlaying time8 hoursTalking time10 hours Capabil
Brand Name: OEM Model Number: KBT-9210 Style: Headband Communication: Wireless Connectors: Bluetooth/Wired Use: Mobile Phone Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) weight: 260g speaker Size: 57mm Packing: Color box Type: Bluetooth wireless/ wired 2 in one Bluetooth version: Bluetooth v2.1+EDR class 2 Feature: built-in microphone, call-forwarding function Support profiles: Headset, Hands free, AVRCP, A2DP Battery: 3.7V lithium-polymer battery 300mAh Talk time: up to 8 hours Packaging & Delivery Packaging Detail: Color box & Your OEM packing Delivery Detail: 3-7days, subject the the final order Specifications Hands free Super HI-FI Stereo Bluetooth headphone 1.hands free 2.bluetooth 2.1 3.HI-FI 4.folded Hands free Super HI-FI Stereo Bluetooth headphone Super HI-FI Stereo; fashion; cool; comfortable design;different folded mode ;1: Headset, Handsfree, A2DP and AVRCP Profiles 2:Automatic Switch-over between calls and music 
Brand Name: AROCCOM Model Number: ELF-BH01 Style: Ear Hook Communication: Wireless Connectors: Bluetooth Use: mobile phone,tablets with call function Function: Bluetooth,Waterproof,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Color: Black Pattern: Ear-hooking Pattern Weight: 8.9g Battery Capacity: 80mA Packaging & Delivery Packaging Detail: 1. Neutral Packing 2. OEM Packing Delivery Detail: About 20 days after sample approval Specifications High sensitivity,low power consumption,suitable for smart phones,tablets with call function Battery:80mA 8.9g soft materials bluetooth headphone,bluetooth earphone for iphone5 for Smart Phone and Tablets with call function Highlights: Compact, portable and fashionable design, easy to carry A Bluetooth headset supports 2 mobile phones at the same time , the housing of headset is plastic with rubber painting CSR V2.1+EDR Bluetooth chipset, Lithium polymer batteryHigh sensitivity, low power co
Specifications *Wirless Bluetooth headphone *Stereo and strong sound *Compatible with cellphone,laptop,iphon,ipad *Competitive price F-0350 Wireless Bluetooth Headphone * Stereo bluetooth headphone* Work with mobile phonesm new Nano, tablet pc* Bluetooth Specification v2.1+EDR class2* Talk / music time: up to 10 hours * Effect range: 10 meters &n
Model Number: N2 Style: In-Ear Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Usage: Mobile Phone Packaging & Delivery Packaging Detail: gift box Delivery Detail: within 3days Specifications Brand New Bluetooth Headset N2 1.high quqlity and comfortable price 2.Super light weight and small size ^.^ Brand New Bluetooth Headset N2 Payment & ShippingWe accept Alipay, West union, Money Gram, and TTWe will ship to worldwide.* We ship within 2~3 days after payment is received * We only ship to the given address .please make sure the name and address is correct before order.* The order will be shipped by Airmail, EMS, UPS,
Specifications 1.Bluetooth headphone 2.Good quality 3.Best services 4.Negotiable MOQ 5.Weclome OEM and ODM HOT!2013 popular super A bluetooth headphone for pc ,phone , ipod 1.Gold-plated Plugs and flat cord2.Many colors can be optional3.suitable for ipod and works with iphone/ music phone hands-free calling4.lightweight soft on-ear cushioned headphones are perfect in any setting5.Competitive price with good quality.6. customers Logo available Detailed information : 1.MaterialABS/pvc/silicone/others2.driver unit15MM3.Sensitivity103+/-3dB at 1000Hz4.Impedence32 ohm / 300 ohm5.Frequency Range20--20,000Hz6.ColorOptional7.Rated Power60mW8.Maximum Power120mW9.Cable LengthApprx.120CM10.logofamous11.WeightApprx.1025g For more detailed info. , welcome to contact Ms. Carrie !O(∩_∩)O~~ s k y p e: dg201207
Brand Name: Joyroom Model Number: J-E01 Style: Ear Hook Communication: Wireless Connectors: 2.5mm Use: Mobile Phone Function: Bluetooth,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Standby time: about 6-10 days Transmission Range: 10 metres Talking time: 6 hours Bluetooth IC: V3.0 Whether stereo: yes Type of technology: Moving-coil Transmission: Bluetooth Materials: carbon fiber Compatible Model: Compatible with PS3, sections of the phone and other Bluetooth devices Color: Black Packaging & Delivery Packaging Detail: Included brand original packaging Delivery Detail: Normally 3-5 days after the 30% deposit Specifications Bluetooth Headset Super Tone Quality Competitive price Exclusive private mode 1.Introduction of the Bluetooth Sound:a). Perfect sound quality and DSP noise reduction echo cancellation technology. 1. Ear-hook style of joyroom carbon fiber Bluetooth headset has a clear sound , delicate , Big sound ,
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 stereo bluetooth headphone 1. competitive price ; 2. good quality; 3. paypal accepted 4. fashion design Fashionable wireless bluetooth stereo headphone DESCRIPTION: Bluetooth Version: V2.0 Chipset: CSR Bluetooth Profile Supported: Headset,Handsfree,A2DP and AVRCP Operation range : 10mFrequency: 2.4GHZ spectrumTalking Time: 7 hoursMusic Playing Time: 5 hours Standby Time: 180 hours Charging Time: 2-3 hours Weight: 100 gPerfect fit, ergonomics and comfort.Stylish patent design,Stereo ModeCool fucntion for music enjoyEasy ControlsLong-Lasting ChargeBuilt-in rechargeable batteryLonger, Larger Range, Fast Pairing, and Minimal Interference SPECIFICATION: Bluetooth VersionV2.1 +EDRChipsetCSRBluetooth Profile SupportedHeadset, Handsfree, A2DP and AVRCPOperation Range10mFrequency2.4GHz spectrumTalking Time15 hoursMusic Playing Time6 hoursStandby Time180 hoursCharging Time2-3 hours
Brand Name: ever-plus Model Number: EBH-01 Style: Headband Communication: Wireless Connectors: USB Use: Computer Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: white,black,pink Specifications bluetooth headphone great stereo sound; noise reduction function; call and music automatically switch; OEM welcome. Stereo Bluetooth Headphone *Great stereo sound *Adjustable band and rotating earpads for comfortable fit *2.0+EDR version &n
Specifications 1.Correspond With V2.1+EDR 2.Frequency Range:2.4026GHz-2.480GHz 3.Easy to charge by USB-Micro USB cable Features and Functions: Touch control stereo bluetooth headsetStatic Current: Under 10UAWorking Current:Under 30mABluetooth Protocol:A2DP,AVRCP,HFP,HSPWorking Voltage:4.2VCharge Current:30mA---150mA(Red LED light up)Max Headset Output Power:L 20mw R 20mwBattery Capacity:30m AH 3.7vCharge Time:3 hoursWorking Time:Above 8 hoursBattery Life span:≥300 times rechargeableAvailable Distance:≥10M (Open and no block)Input Voltage:DC 5V/200mA (Can be connected to USB port)Standby Time:Above 30 hoursOutput Power:Class 2Support Bluetooth 2.1 version +EDR Technical Specifications 1.Correspond With V2.1+EDR 2.Headset Profile,Handsfree Profile and Advanced Audio Distribution Profile(A2DP) 3.Frequency Range:
Specifications 1.bluetooth headphones with speakers; 2.foldable&portable design; 3.3 in1 design; 4.PRV/NEXT/Play/Pause/Answer/Stop Calls; Unique Product Features:bluetooth headphones bluetooth headphones bluetooth headphones1. bluetooth headphones with speakers; 2. foldable & portable design; 3. multifunctionality; &nbs
Brand Name: Swei Model Number: siw-3p2217 Style: Headband Communication: Wireless Connectors: PS3 Use: PS3 Function: Bluetooth Place of Origin: Guangdong China (Mainland) Bluetooth protocol: version 2.1 Bluetooth range: 10meters. Power supply: DC5.1V/120Ma Packaging & Delivery Packaging Detail: Hard blister Delivery Detail: 3-10 working days after receipt of payment Specifications Bluetooth Headphone for PS3 Bluetooth headset for PS3 Wireless headphone for PS3 OEM is welcome Bluetooth Headphone for PS3Bluetooth headset for PS3Wireless headphone for PS3OEM is welcome Looks Elegant and Calm, same gorgeous appearance with ps3 Video Game.Blocks 4 times the external noise,keeping your conversation in crystal clear sound everywhere!Compatible with all bluetooth cell phones,it beautifully works in office.Enjoy fun of wireless via an bluetooth dongle ,it works well with SKYPE,MSN,and VoIP.Crystal clear sound can thoroughly release your hands to enjoy your work!Features:1). Either t
Specifications Bluetooth headset 1) Stereo Bluetooth Headset with back-hang style 2) Wireless enjoy stereo music and calls Bluetooth headset Features:1) Stereo Bluetooth Headset with back-hang style2) Wireless enjoy stereo music and calls3) Have voice dialing4) Suitable for mobile phones, PDA and PC5) Soft earwearing enable user comfortable6) When listen to music, it automatically mutes with each incoming call and continue after hang up Specification:1) Hardware Version: Rev.R032) Bluetooth specfication: Bluetooth 1.2 compliant3) Supported profile: A2DP, AVRCP4) Power class: classII5) Frequency Range: 2402-2480 MHz6) Spread spectrum: FHSS (79 channels) USA/EU7) Modulation: GFSK (Gaussian frequency shift keying)8) Interoperability: support the Bluetooth A2DP, AVRCP and HS/HF profiles9) Security: Pairing, encryption and aut
Specifications cheapest headset and headphone : 1.high quality 2.clear sound listening 3.fashionable design 4.do OEM 2013 cheapest headset and headphone with 3.5mm jack : Product Features:Sound quality with super bass speakerColorful ear shells nakes it beautifulOEM & ODM is welcomeadjustable head band and comfortable wearing Best for mp3/mp4, CD, PC/laptop Specs: view of products we are 5 years gold supplier on alibaba. "we believe in great service every time.all the time " our products are complied with cetificated and has long warranty and after-sell services this is our home and production line ,we have strict policy and feiendly team here are the exhibitions we attended. our new upda
Specifications EX-01 Bluetooth Headset for P3 1)Exclusively designed for gaming 2)it's easily paired to your p3 3)color:black EX-01 BLUETOOTH HEADSET FOR P31)Exclusively designed for gaming2)it's easily paired to your p3 3)color:black EXCLUSIVELY DESIGNED FOR GAMINGThe EX-01 Wireless Bluetooth Headset has been exclusively designed for gamer and gaming,not mobile phones!So you can now maximise you game time without an irritating,uncomfortable earpiece ,and still hear your opponent creeping up behind you on your surround sound system! Not only is the EX-01 one of the most comfortable gaming headsets,it's easily paired to you p3 and intuitiv
Brand Name: Midte Model Number: Q900 Style: In-Ear Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Waterproof,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) OEM: yes LOGO: customerized Price: factory price Color: customerized Sample: Available Specifications in-ear bluetooth earphone Automatically switch between music and call Long standby time Muti-point connection OEM 2013 new product Bluetooh single earphone Specifications Model No. of Bluetooth Earphone Q900 Chip 6145 chip Supporting EditionBluetooth version: V4.0+EDR Frequency Range2.4GHz Bluetooth VersionV4.0 Other Compatible Versions V1.1, V1.0, V1.2 V2.0 Scope of Work 10 Mi Neipei Transmission Power of Bluetooth Earphone Class 2Transmission Distance About 10MSupport mode A2DP, Headset, Headfree Supported ModeBluetooth-enabled mobile phone, Tablet PC, laptop Talk / music playback time about 4