The Wahoo RPM Cadence Sensor is a wireless, magnet-less, lightweight, cadence sensor
Bluetooth 4.0 Smart enabled
Sensor is easy to install & connects wirelessly to your iOS device
Displays your cadence data right on your iPhone (through the free Wahoo Fitness App or your favorite cycling app – including Strava & MapMyRide)
Only 7 grams
Two mounting options included: (1) mount with double sided 3M tape, or (2) use the silicone sleeve and mount with zip ties
No charging required: oeprates on a coin cell battery for up to 2 years without ever taking it off your bike
LED lights flash to let you know that you`re connected & ready to ride!
Universal Fit: RPM will work with any bike
Works with iPhone 4s, 5, 5s, 5c, iPod Touch (5th generation), the new iPad (3rd and 4th generations)