4iiii R100 Riiiide Cycling Speed and Cadence Sensor Riiiide contents: Speed & cadence sensor, rubber strap, crank magnet, spoke magnet, 2 zip ties, re-usable packaging, touch-through waterproof smartphone protector bag, and a coin cell battery. Small with a low drag profile Sends speed and cadence to any ANT+ cycle computer or watch Compatible with ANT+ displays like Garmin, Bontrager, Blackburn, and others Easy to install on any bicycle.