Item Specifics: \n \nBluetooch 4.1 +EDR specification. \nBattery capacity: 120 mAh. \nBluetooth protocol: HFP v1.6, HSP v1.2,A2DP v1.3, AVRCP v1.5, SPP v1.2 \nAudio performance: Support SBC, MP3, AAC,stereo. \nBluetooth distance: 10 meters(accessibility). \nWorking time: 3 hours use with 100 hour standby \nAnswer / hang up the phone, call waiting,volume adjustment, up and down the first switch, music play / pause, telephone redial,Bluetooth Wireless