Take the next step in tracking your performancesatisfied with the speed data from your phone or gps bike computer but want to track your cadence too the wahoo rpm cadence sensor is your sleek little solution it easily mounts to your bike or shoe and the dual band technology allows you to connect to and display data on both smartphones and gps bike computers collecting cadence data has never been this easy compatible with iphone 4s and newer ipad 3rd gen and newer ipad mini ipad air ipod