1. Pairing easy, without press any button 2. Pairing up to 4 phones; auto connected to the last paired phone; 3. Read out the caller ID with Engineer or other Language 4. Full duples conversation , DSP arithmetic for echo cancellation& noise reppression 5. BT V1.2,HFP/HSP,AVRCP/A2DP 6. Compatible with all mobile phones with bluetooth on the market 7. High power ampifier output and use the vehicle's speakers 8. Directional high sensitive microphone 9. Voice dialing, Redial, Pick up,Hang up 10. Automatic Loudspeaker mute 11. Without lose any incoming calling during enjoy music 12. 1 Electronic eontrol unit, 1 external Microphone, 1 Power supply cable,Mute cable with ISO connector,1 Keypad ,fitting accessories, user guide 13. Easy to install