Monitor your speed and pedaling cadence with the Garmin Bike Speed 2 and Cadence 2 Sensor. The cadence sensor easily attaches to your bike's chainstays with a zip tie or the included rubber bands, and wirelessly tracks the revolutions of your cranks. The speed sensor attaches to the hub of either wheel and self-calibrates with your Edge to give you accurate speed and distance at all times, including indoors on the turbo trainer. Simply attach the sensor and ride. With no magnets or other exposed parts to line up, this sensor is easy to install, maintain and move between bikes. It's compatible with a host of Garmin and ANT+ products, with the Garmin models listed below