The 30K features Sena's intuitive Mesh Intercom technology plus HD Speakers. One click of a button instantaneously connects to a virtually limitless number of 30K users within a mile range via Mesh-network technology. With a more stable connection, the 30K also intelligently searches for intercom connections when they are lost and automatically reconnects once back in range - without affecting the rest of the group. Sena's premium HD speakers are redesigned and optimized for both physical comfort and unmatched audio performance.