Features Bluetooth version 3,0 Bluetooth class 2 Maximun range BIKE TO BIKE (m) 200 Multipoint intercom+ 2 phones/gps Stereo Music (A2DP) yes Number of headsets in communication (conference) 2 Power supply connection Micro USB 12V charger included in the kit only USB/micro USB cable Firmware Upgradeable yes Function setting by software yes Number of buttons 2 Battery status check LED / Voice VOICE PROMPT yes Bluetooth Music Playback Control by AVRCP yes AVC (automatic volume control) no Separate volume setting per bluetooth device yes Stand by time (hours) 168 Talk time (hours) 8 Recharge time (hours) 2,5 Answer call by voice (voice response) yes