SENA 20S EVO BLUETOOTH 4.1 COMM SYSTEM - 843-01240The 20S EVO is the next generation of the original 20S, with an updated design and improved intercom functionality and stability to keep up with your ride. The 20S EVO was designed with a fixed type, shark fin antenna as opposed to its predecessor with the flip up antenna. This sleek new antenna design improves upon intercom stability and even secures the intercom distance while updates to the hardware allow for an even more robust general performance