Model BH-M29 (SIG: https://www.bluetooth.org/tpg/EPL_Detail.cfm?ProductID=30215 ) Quantity 1 Color Black + Silver Bluetooth Version v2.1 Ear Coupling Wireless and Bluetooth Talk Time 8 Hour Standby Time 125 Hour Operating Range Max. 10 meter Compatibility Mobile phone with Bluetooth comes with wireless transmission can chat online Microphone Yes Radio N/A Supports Music Format N/A Power Supply Built-in battery Built-in Battery Capacity 100mA Compatible With Iphone 4 / 4S Other Features Power supply: DC 5V AC 100~240V; Comes with charger and three earhooks for different situations: earhook is for driving head waring for receiving in office also convenient to dial neckband is lightweight and portable for sports Packing List 1 x Headset