<b>Why You Need A Bike Speed & Cadence Sensor?</b><br> For cyclists, it's important to master your own cadence, and a stable cadence is the foundation of scientific cycling. Helps cyclists get a better energy output power ratio.<br><br> <b>Note:</b><br> Please kindly make sure you follow the steps below:<br> Install this bike sensor according to the user manual.<br> Download Apps(WAHOOFITNESS/STRAVA/MAPMYRIDE) and make sure your bluetooth is on.<br> App shows the data only when you're cycling, please make sure the distance from the app and bike sensor is within 10 meters.