Sena EXPAND-02 EXPAND Long-Range Bluetooth Intercom and Stereo Headset A STABLE, SECURE FIT - Stays put while youre playing GOOD TO GO UNDER ANY CONDITIONS - Impervious to water, sweat, and thinking twice SHARE, TALK, AND HAVE FUN - Share music, Make calls, Talk over intercom, 900-meter (980 yards) range COMPATIBILITY BETWEEN FRIENDS GUARANTEED - Thanks to Universal Intercom protocol Talk time: 10 hours | Stand-by time: 7 days