Lezyne Pro Cadence SensorThe Lezyne Pro Cadence Sensor is versatile sensor that works with most bike frames and cycle computers.The sensor is constructed with a Translucent Composite Matrix construction that ensures the sensor is incredibly lightweight and incredibly compact. An LED sensor makes it easy to know when your connected and when the sensor is recording. The sensor comes with a magnet-free installation system that mounts easily to most crankarms. Working with a large variety of devices the sensor connects via a high-tech dual Bluetooth system that allows you to sync with more than one device at the same time.SpecificationsWeight: 11gDimensions: 37mm x 33mm x 13mmFeaturesCompactIncredibly lightweightMagnet-free installationTranslucent Composite Matrix constructionLED indicatorMounts to most crankarmsHigh-tech dual Bluetooth systemPowered by a replaceable CR2032Buy Lezyne Cycle GPS from Chain Reaction Cycles, the World's Largest Online Bike Store.