Wahoo Blue SC Speed and Cadence Sensor for iPhone, Android and Bike Computers Track and capture real-time speed, cadence and distance on your iPhone, Android, and bike computer. NOTE:Kindly refer the user manual before usage of the product. Connects wirelessly via Bluetooth 4.0 and ANT+ to your iPhone, Android and/or bike computer. The magnet will have to pass within 1/8 inch to get a reading Works with Zwift and TrainerRoad!Capture cadenceon your favorite indoor cycling platform, No tangled wires on your bike to connect the sensor to your device. Also works with the free Wahoo Fitness app, Strava, RideWithGPS, MapMyRide, Cyclemeter, and more!. Supported iDevices: iPhone,iPhone 4S and newer,iPad,iPad (3rd gen and newer),iPod ,iPod Touch (5th gen) Lightweight and easy to install, comes with both rubber band and zip tie mounts.Universal fit - works with most bikes and frame sizes.