Wahoo RPM Sensor

Track and capture cycling speed and Cadence data on your iPhone, Android, and bike computer
Lightweight and easy to install – no magnets. Speed sensor mounts to any bike’s wheel hub. Cadence sensor easily attaches to your bike’s crank arm or shoe (both mounts included)

Connects wirelessly via Bluetooth 4.0 and ANT+ to your iPhone, Android and/or bike computer
Works with Zwift and trainer road! capture speed and Cadence on your favorite indoor cycling platform
Also works with the free Wahoo Fitness app, Strava, RideWithGPS, MapMyRide, Cyclemeter, and more!

Alex: