Nady Bike-to-Bike Radio Communicator MRC-11X 2-Mile 22-Channel FRS/GMRS Two-Way Radio (Pair) 22 GMRS/FRS channels and 38 privacy codes Built-in full duplex passenger/driver intercom and simplex radio communication Noise canceling in-helmet headset with PTT or VOX operation Auxiliary stereo input and 2 headphone jacks 500mW, 2 mile range; uses 3 AA batteries