The Wahoo RPM speed sensor is the sleek, magnet-less solution for capturing cycling speed data. It easily mounts to your bike's front wheel hub, and the Bluetooth Smart and ANT+ dual band technology allows you to connect to and display data on both smartphones and bike computers. Tracking speed data has never been this easy.
Physical Dimensions (LxWxH): 1.25" x.75" x 1"
Weight: 7 grams
Weight: 3.5 oz
Battery Life: Up to 12 months
Waterproof Rating: IPX7 (waterproof up to 5 ft)
Wireless Signal Strength Up to 10 feet