Take your pedaling efficiency to the next level by using the Coros Bike Cadence Sensor.Tracking cycling cadence helps you find your ideal pedal stroke to ride longer, stronger, and more efficiently. It easily pairs with your bike computer, smartwatch, or smartphone via Bluetooth, and even works with most spin bikes.Features:Track your RPMs to optimize pedaling efficiencyIntegrates with most bike computers, smartwatches, and training apps via BluetoothEasy to install with a compact design that mounts to your crank armCR2032 battery lasts up to 12 monthsIP67 water rating for all-weather protection and durabilityUltra-lightweight at 11gCompatible with most bikes, including indoor spin bikesNot compatible with ANT+ devices