Bluetooth Wireless HandFree Sports Stereo Headset Earphone For iPhone Size: N/A Specification: Bluetooth working range: 10M Model:HV800 Output power: 2-20mW Working current: 25-30mA Charging voltage: micro USB 5v Frequency range: 2.401-2.480GHz Charging time: 2-3h Bluetooth Version: 4.0+EDR Package Content: 1 X Wireless Bluetooth Sport Stereo Headset 1 X Micro USB Cable