Cycling on a regular basis is great for your health and the environment. Accidents can always happen if you are not careful on the road though. The Garmin Varia RTL515 is a rearview cycling radar with tail light that makes you aware of vehicles coming from behind up to 153 yards away. It combines with your smartphone to give you tone and vibration alerts to approaching cars.
The Varia RTL515 has a daylight visibility of up to 1 mile. It has a compact design and works with third party apps such as Ride with GPS.