Quantity 1 piece(s) Color Black + white Function Handsfree Compatible Cellphone Iphone / Samsung etc cell phone with Bluetooth function Phonebook Capacity 0 Bluetooth Version 3 Transmit Frequency 2.4GHz~2.480GHz Transmt Distance Max 10 m MIC Effective Distance 2m SNR 82 dB THD 0.5% Frequency Response 300Hz~20kHz Talk Time 10 H Standby Time 500 H Charging Time 2 H Battery Capacity 600 mAh Interface/Port Micro USB External Card Max. Support 0 Other Features Supports two cell phone connection at the same time; Stereo sound data transmission; Automatic re-connection: When cell phone leaves car it will automatic re-connection after back to car within 15 minutes; Built-in rechargeable lithium battery; Environmental and energy saving Packing List 1 x Bluetooth hands-free phone 1 x Car charger adapter (12~24V)1 x USB cable (80cm)1 x Chinese / English user manual