The SMH5 series is a two-way intercom function that allows you to stay connected with your companion via the crystal-clear Bluetooth stereo headset. Bluetooth 5.1 technology gives you the ability to make hands-free calls and participate in a one-to-one intercom conversation with a riding buddy up to 400 meters away while delivering GPS directions, and providing the capability to listen to and share music when paired with an MP3 player or smartphone. The SMH5 functions as a noise-canceling motorcycle helmet delivering crystal-clear natural sound that gets an automatic boost in noisy environments