Super sleek and lightweight, weighing only 7 grams, the tiny Wahoo RPM Cycling Cadence Sensor is there to help you keeps tabs on your pedal rate. It doesn’t use wires or magnets, and can easily mount to your crank arm with double sided tape or a silicone sleeve and zip ties. It can also be mounted to your shoe so you can use it on multiple bikes or on a stationary bike inside. It is compatible with both ANT+ and BLE, so you can connect wirelessly to your smartphone or your GPS device for live data readings through a host of compatible apps. Two LED lights show the sensor’s device connection (blue) and cadence detection (red). The Wahoo RPM Cycling Cadence Sensor operates on a replaceable coin cell battery that has a life of up to a year, no charging required. Included with the RPM Cycling Cadence Sensor is the pre-installed battery, a rubber mounting option, zipties, shoe mount option, 3M double sided tape, quick start guide, and important product info guide.