The Wahoo RFLKT is the world’s first iPhone powered bike computer. All the power of your iPhone in the size of a sleek cycling computer. Keep your iPhone safely tucked in your jersey pocket and access all of your App data from your bars. RFLKT is compatible with the NEW Wahoo Fitness v3.0 App for Cycling and compatibility with other top rated cycling Apps coming soon including Cyclemeter and Strava. iPhone 4S and iPhone 5 compatible.