... talk-back and voice dial2. Support: Bluetooth earphone , hands free to Bluetooth earphone , hands free to hands free , and the distance is 10m3. 500m distance ... as mobile phone , GPS or stereo invoice and the other Bluetooth two way radio earphone 6. Answer the phone , ... could be switched between hands free with mobile phone10.Support Bluetooth GPS invoice or Bluetooth stereo media player , SBC and ...