Excellent condition , easy to install. Measure and save real-time speed, cadence, and distance on your mobile device. Works with Bluetooth 4.0 and ANT+ with iPhones, Android phones, and/or bike computers. Works with Zwift and TrainerRoad! Measure cadence on your favorite indoor trainer platform. View Strava on your handlebars. Combine the Wahoo Blue SC speed and cadence sensor with the Wahoo RFLKT bike computer to measure and display data from your cycling app while you ride. Works with free apps, RideWithGPS, MapMyRide, Cyclemeter, and others. Lightweight and easy to mount, comes with both a rubber band and cable ties. Universal - fits most bikes and frame sizes.