This offroad flex boom helmet kit features Rugged Radios' new Dura-Link Sealed Connector, dynamic noise canceling mic for best audio performance, and 3.5mm input port for ear buds or helmet speakers. The Dura-Link Seal is a new molded design now featured on all Rugged helmet kits to seal the connection between the intercom cable and helmet kit plug. This new design is perfect for offroad race teams. The Dura-Link Seal protects the connection contacts from water, mud, and dirt which can affect audio performance. The Dura-Link Seal works with current Rugged OFFROAD intercom cables, and is now featured on all Rugged Offroad helmet kits.