Color Black Brand N/A Model WQ-2 Quantity 1 Set Material Plastic Function HandsfreeMP3 PlayerPower Off Memory functionA2DP Compatible Cellphone IphoneMotorolaBlackberryLGSumsangNokiaSonyEricssonHTC Phonebook Capacity NO Voice Prompt No Bluetooth Version V4.0 Transmit Frequency 2.4~2.48 GHz Transmt Distance 5~8 m MIC Effective Distance 2 cm Frequency Response 20Hz~20KHz SNR 83dB THD 0.4??/td> Battery Capacity No mAh Charging Voltage 12-24 V Talk Time N/A Hour Standby Time N/A Hour Charging Time N/A Hour Interface/Port USB 2.0 Other Features MP3 player function' Supports stereo A2DP function; Freely enjoy music and select the song (previous / next); Supports Bluetooth stereo talk; Supports Bluetooth receive and transmit; DSP dual-channel talk to filter noise and shield the echo; External DC 12~24V car cigarette lighter power supply; Dual-USB 5V 1000mAh output ports to charge for your cell phone or MID Packing List 1 x Car Bluetooth hands-free device