The Sena 20S EVO was designed with a fixed type; shark fin antenna as opposed to the flip up antenna of the original 20S. This sleek antenna design improved group Bluetooth intercom stability and distance; while updates to the hardware allow for a more robust general performance. In addition to its original updated design; the latest upgrade for the 20S EVO are Sena’s premium HD speakers. Designed with a beveled taper; the HD speakers fit easily into helmet pockets and give riders a more comfortable experience. Sena’s HD speakers offer a marked increase in volume; bass boost; and clarity. The 20S EVO delivers HD-quality audio allowing riders to listen to music; GPS and make or take calls. Sena’s Advanced Noise Control™ helps so wind noise doesn’t interfere with incoming or outgoing audio; while the innovative Bluetooth intercom for motorcycles allows you to talk with up to 7 other riders at distances up to 2 km (1.2 miles) away.