This Headset does it all. Wireless unit with bike-to-bike intercom (up to 215 yards). Connect to mobile phone/GPS Bluetooth. Voice control technology - recieve/initiate/reject calls. Fits virtually any motorcycle helmet- installs in minutes. Fully weather protected. Automatic volume adjustment. FM Radio. Talk time- up to 8 hours/standby up to 10 days. Noise/wind compensating microphone. For use with another Cardo-Rider Q2 (purchase separately.)