Wahoo rpm speed and cadence bundleall you need for cycling data all together at once the wahoo rpm speed and cadence sensors are both a sleek wireless and magnet less solution each mounts easily to your bike and the bluetooth 40 and ant duel band technology allows you to connect and display data on both smartphone and gps bike computers featuresspeed dual band technologywireless connectionmagnetlesssleek lightweight designspeed measurementvisible connectionreplaceable batteryuniversal f