UCLEAR lets you bring the music, phone, friends, and GPS on any adventure. With extreme noise cancellation up to 75 MPH, don't miss a beat. Connect your world. Permanent Helmet Mount Set: Set of two (2) rectangular metal clips backed with 3M adhesive to allow for mounting the UCLEAR unit to the side of your helmet. Compatable with: HBC100 and HBC200 series products. Temporary Mounting Clip Set: Temporary clips allow for quick and easy removal of UCLEAR unit to transfer from one helmet to another. Compatable with: HBC100 and HBC200 series products.