Brand N/A Model BTLD-158 Quantity 1 piece(s) Color Black Function Handsfree Compatible Cellphone Mobile phones with bluetooth function Phonebook Capacity No Bluetooth Version 3.0 Transmit Frequency 2.4~2.48GHz Transmt Distance 10 m MIC Effective Distance 1 meters SNR 0.1 dB THD 0.1 Frequency Response N/A Talk Time 15~16 H Standby Time 1000 H Charging Time 2~3 H Battery Capacity 600~ 650 mAh Interface/Port Mini USB External Card Max. Support No BQB Certification No Other Features Match two phones simultaneously memorize 8 Bluetooth mobile phones pairing at most. (Unique technology can also support two phones at their standby mode when they are connecting); Built-in DSP noise abatement and echo cancellation; Equipped with 2W HD loudspeaker and high sensitivity microphone Packing List 1 x Bluetooth Speaker 1 x USB Cable (47cm) 1 x Car Cigarette Lighter Plug Charger