Bluetooth Version: AC6905A V 4.2
Profile:A2DP V1.3. ACRCP V1.4. HFP V1.6
Transmission distance:> 10M Talking time: about 16 hours(70% volume)
Playing time: about 5-8 hours(70% volume)
Charging time:5 hours Standby time: about 4 months Function: hand free phone, FM Radio, TF Card music play, Aux in (apply to PC/mobile phone/mp3 etc). BT connect.