The Freecom 1 from Cardo is one of the slimmest and best functioning Bluetooth headsets a rider can get. It can handle everything you want on your ride like; radio, music, GPS, and most importantly, rider & rider-tp-passenger communication. If you get caught in the rain, don't worry. The Freecom 1 has an IP67 waterproof rating. So no matter how harsh it gets outside, your headset will be right by your side every twist and turn of the highway. With Automatic Volume, it will adjust the volume accordingly to the outside ambient noise. The Audio Sharing feature allows you to share your music with your passenger so you both can jam together! It doesn't stop there. The Freecom 1 has many more features that make it one of the top Bluetooth communication systems on the market today!