See and be seen with the Varia RTL515 rearview radar with tail light. 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. When used with your compatible smartphone, the Varia™ app helps increase your awareness with vibration alerts and more. 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 road-use bicycles. And peloton mode provides a low-intensity flash that is kind to other riders’ eyes when riding in a group.When used with a compatible smartphone, Varia radar integrates with third-party apps such as Ride with GPS to overlay your maps with rearview radar alerts. It pairs seamlessly with your Edge® bike computer and compatible smartphone as well as select Garmin wearablesor the radar display unit. With a new additional shim, Varia can now be mounted to D-shaped, aero and round seat posts.