Universal bluetooth handsfree car kit.

Production No.H817
1:supports most bluetooth mobile phones
2:complies with the bluetooth 2.0 protocol and facilitates built-in  bluetooth
  audio transmission
3:suitable for 12-24 volt power application
4:voice activation of phone via the unit's microphone or of the phones
5:built-in DSP chipfor better background noise and echo cancelling
6:built-in volume control to adjust volume
7:easy to change conversation mode between hansfree and private mode
8:supports to redial the last phone numbers
9:external speaker for option.