Bluetooth version 4.0 Low Energy Profile Support: HSP/HFP/A2DP/AVRCP 65mAh rechargeable battery Bass enhancement technology Charging time: 1.5 hours Micro USB charging port Connect with two Bluetooth devices at the same time. conference calls anywhere-in the office, car, at home, alone or with a group,with function of Voice Dial,Last Number Redial. Talk time: 4.5hours Music play time: 4 hours Standby time up to 100 hours Headset battery icon can display on the iOS device. The main material: ABS and Aluminum alloy Metal. Package Inclueds: 1 X Bluetooth Headset 1 x Micro USB Cable 1 x USb Travel Adapter 1 x User Manual