See and be seen with Varia rearview radar \n It pairs with your Edge bike computer, other Garmin device or compatible smartphone to alert you of vehicles approaching from behind up to 153 yards (140 meters) away \n When used with your compatible smartphone, the Varia app helps increase your awareness with vibration alerts and more \n With daylight visibility up to 1 mile, motorists will be able to see you from a distance The radar’s compact vertical design allows for device mounting on most roaduse bicycles. Peloton mode provides a lowintensity flash that is kind to other riders’ eyes when riding in a group