This is the Aryca Wave 2 Waterproof iPhone Case with Mount Kit for Bike, Motorcycle and Jetski Features: Roll Bar/seat Post mount along with Aricase adaptor enables you to connect your Aricase Wave 2 to any cylinder type of bar between .75 inch to 2.5 inch The mount is appropriate for biking, jet skiing, snow mobile & any sports with a handle bar or a pole such as snow ski This sporting kit includes roll bar/seat post mount, floating lanyard, Aricase adaptor, extender, & Wave II (Compatible with iPhone 4/4S)