Sena 3S Plus Boom Bluetooth Communication System

2-Way Bluetooth Intercom headset with built-in Boom microphone, 1:1 HD Intercom lets the user hear high-definition intercom conversation, Talk time of up to 20 hours; recharges in 3 hours, Working distance of up to 400 meters (0.25 miles) in open terrain, Fits in most jet and open-face motorcycle helmets