Quantity 1 piece(s) Color Black + silver Material Plastic housing Function Handsfree Compatible Cellphone The cellphone with Bluetooth Phonebook Capacity No Bluetooth Version 3 Transmit Frequency ISM 2.4~2.48GHz Transmt Distance 10 m MIC Effective Distance 3 meters SNR over 90 dB THD Frequency Response 20~20000Hz Talk Time 15~16 H Standby Time 1000 H Charging Time 2~3 H Battery Capacity 3.7V 890 mAh Interface/Port Mini USB Language English Other Features Supports handsfree; Supports to match one cellphone at the same time can remember 8 cellphone match; Built-in DSP noise suppression and echo cancellation function; With high fidelity 2W speaker and high sensitivity microphone Packing List 1 x Bluetooth speakerphone 1 x BL-5B lithium ion battery 1 x USB cable (60cm) 1 x Clip 1 x Car charger (DC 12~24V) 1 x Chinese / English user manual