Color Black + Silver Brand N/A Model X3 Quantity 1 Piece Material Plastic Function Handsfree Compatible Cellphone IPHONEMotorolaBlackberryLGSumsangNokiaSonyEricssonHTC Phonebook Capacity 8 Voice Prompt Yes Voice Prompt Language English Bluetooth Version V4.0 Transmit Frequency 2.4 GHz Transmt Distance 10 m MIC Effective Distance 1 m Frequency Response 20Hz~15KHz SNR 60 dB THD Battery Capacity 800 mAh Charging Voltage DC 5 V Talk Time 18 Hour Standby Time 60 Hour Charging Time 3 Hour Interface/Port Mini USB Packing List 1 x Car Bluetooth 1 x Mini cable (80cm) 1 x 3.7V / 800mAh lithium battery 1 x Clip 1 x English / Chinese user manual 1 x Car charger (12~24V)