1. Support 500m range full duplex talkback

2. Auto switch seamlessly among the Bluetooth mobile phone, intercom and stereo music

3. Mobile phone priority, automatically switch to mobile phone when incoming call, self recover intercom when you hang up

4. Answer, reject, hang up, and call out functions supported

5. Support the last number redial, voice dial

6. Support audio transfer

7. Sharing the music form the mobile phone or connecting with GPS audio through A2DP

8. Support play, pause, playback and forward music through AVRCP

9. With DSP noise suppression and echo cancellation to ensure the clear voice quality when speeding along the highway

10. Optional FM radio frequency function covers 76~108MHz