Elevate your ride with the COROS Bike Speed Sensor. Track your speed and distance data in real-time, letting you measure performance on every ride. Perfect for both outdoor rides and indoor sessions on your trainer where GPS falls short. Easily pairs with your bike computer, smartwatch, or smartphone via Bluetooth.Measure your speed and distance without the need for GPSIntegrates with most bike computers, sports watches, and training apps via BluetoothEasy to install with a compact design that mounts to the hub of your front or rear wheelCR2032 battery lasts up to 12 monthsIP67 water rating for all-weather protection and durabilityUltra-lightweight at 17gNot compatible with most indoor spin bikes or ANT+ devices