Specifications: Bluetooth Bluetooth specification V4.0 Support protocol Hands-free A2DP Avrcp Headset Wireless transmission standard: CLASS2 transmission range 10 meters Transmission frequency: 2.4GHz Charging voltage: 5V DC Charging time: less than 2 hours Call time: 10 hours or more Music time: 6.5 hours or more Standby time: 130 hours or more Battery capacity: 130mAH Package Included: 1 x Bluetooth Headset 1 x USB Charging Cable 1 x Use Manual