*Wirelessdesign. *Itisavailableforofficeandhomebesidesvehicle. *ApplicationoflatestDSPtechnologycanguaranteecallquality. VTB-66BLUETOOTHsoccer MAINFUNCTIONSANDFEATURESOFVTB-66BLUETOOTHSOCCER PROHIBTEDUSINGTHEMOBILEWHENYOUAREDRIVINGTHECAR! BLUETOOTHSOCCERTASTESOFJOYWITHYOU. *Fullduplex,noiseandechocancellation,DSPtechnology *Biuetoothspecification:12 *Build-inmicrophoneandloudspeaker. *Voicedialing,lastcallredialingandcallswitchingfunction *Inbuilthigh-volumerechargeablelithiumbattery,andstandbyabove10days *build-inlithiumbattery