Wahoo Blue SC Speed and Cadence Sensor

Speed and cadence sensor transforms your phone into a powerful cycling computer. Using Bluetooth Smart and ANT+ technology, it tracks cycling speed, cadence, and distance which can be paired with your favorite cycling app including Strava and Zwift, or paired to your bike computer. It's weatherproof, small with a low drag profile, and comes with a rubber band and zip tie mounts. Weight: 36g. Water Rating: IPX7. Wireless Signal Strength: Up to 3m.