Midland BTREBEL Bluetooth Intercom System for ATV (Single) Compatible With Most Helmet Types Compatible With Other Bluetooth-Enabled Devices Such As Gps Systems & Cellular Phones Allows For A Wired Connection To Ipod/Mp3 Players & Gmrs/Frs Transceivers When Connected To A Cellular Phone With Built In Mp3 Pla Complete Bluetooth wireless multimedia system for a solo ATV rider Connect up to three separate Bluetooth devices or use 3.5mm wired audio input Automatic gain function controls the volume in relation to background noise Two wind-resistant, noise-canceling microphones included to fit open-face/flip-top helmets Two-year manufacturer's warranty