Wahoo - RPM Speed Sensor

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. Features Wireless Connection Magnetless Hub Mounted Two LED lights that show connectivity & spee dectection Replaceable Battery