Transmission range: 10 metersFunction: support music、 voice control、 phone、 electricity、 according to a multipoint connectionBluetooth protocol: 4.1Track: stereoUse method: earplugsWhether the single and double ears: unilateral hands-freeColors: black、 white、 golden、 silver、 rose gold4.1 standard configuration: bluetooth host、 ears hang、 headphones line、 USB charging line、 specification、 packagingCall: hd noise clearly on the phone、 voice control answer YES answer NO hang upCalls to broadcast number: telephone voice to mobile phone numberVoice prompt: to telegraph number/boot/is power off/connected/disconnected/low power and so onListening to music: / pause/play.Power shows that: in the iphone can display power of bluetooth headsetDual standby: connecting two mobile phone or a tablet at the same timeIntelligent CVC dual mic noise reductionCompatibility: can be used with bluetooth phones、 regardless of the brandPackage include: 1 x Bluetooth headset