See and be seen with the Garmin Varia RTL515 Rearview Radar 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.

Stay aware of approaching cars with Varia RVR315 rearview radar. It pairs with your Edge bike computer 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 uses bold graphics — plus tone and vibration alerts — to indicate the position and speed of approaching vehicles

Warns of vehicles approaching from behind up to 153 yards (140 meters). Improved detection of vehicles as they slow behind you
Improved daytime visibility so drivers can see the cyclist well before the radar sees the vehicle (RTL515 only). Daylight visibility up to 1 mile
Varia Mobile App: Allows you to get the full Varia radar experience via your smartphone without the need for a head unit.
Varia RTL515 features multiple modes, including peloton mode, which provides a low-intensity flash that is kind to other cyclists’ 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
Pairs seamlessly with your Edge bike computer and compatible smartphone as well as select Garmin wearables or the radar display unit
Battery Life: up to 16 hours in day flash mode, up to 6 hours in solid mode