This off road 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 to seal the connection between the intercom cable and helmet kit plug. This new design is perfect for off road 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 Radios off-road intercom cables and is now featured on all Rugged Radios off road helmet kits. New Dura-Link Seal3.5mm Ear Buds JackFull Flex Boom MicrophoneDynamic Noise Canceling Microphone Rugged Radios HK-OF Off Road Helmet Kit Rugged Radios HK-NF NASCAR Wired Helmet Kit Rugged Radios HK-NFC NASCAR Wired Helmet Kit Rugged Radios HK-IF IMSA Wired Helmet Kit Rugged Radios HK-IFC IMSA Wired Helmet Kit Add to Cart Buying Options Buying Options Buying Options Buying Options Customer Reviews 2.9 out of 5 stars 3 — 5.0 out of 5 stars 5 4.5 out of 5 stars 9 3.7 out of 5 stars 28 Price $89.00$89.00 — no data — no data — no data — no data Wiring Compatibility Off Road Nexus NASCAR NASCAR IMSA IMSA Cord Type Straight Cord Straight Cord Coil Cord Straight Cord Coil Cord Microphone Style Full Flex Boom Full Flex Boom Full Flex Boom Full Flex Boom Full Flex Boom Microphone Dynamic Noise Cancelling Dynamic Noise Cancelling Dynamic Noise Cancelling Dynamic Noise Cancelling Dynamic Noise Cancelling Ear Bud Jack 3.5mm Jack 3.5mm Jack 3.5mm Jack 1/8" Jack 1/8" Jack