Excelvan Motorcycle Bluetooth Headset/Intercom with Universal Microphone Kit, Support 6 Riders Pairing, a Host and 5 Auxiliaries Wireless bluetooth intercom between separate riders at a distance of approx 1200m (1312 yards) Full duplex interphone. Support 6 riders pairing, a host and 5 auxiliaries. Once upon pairing, the host can choose any one of the 5 to talk to. Bluetooth 3.0 connectivity to listen to and share music, make phone calls with speed dialing, and participate in a four-way intercom conversation Advanced Noise Control technology cuts down on background noise for both incoming and outgoing audio Universal Intercom protocol for cross-brand intercom compatibility. Up to 8 hours of talk time and 10 days of stand-by time on a single charge