MAXIMUM AWARENESS Varia RVR315 rearview radar provides visual and audible alerts for vehicles approaching from behind up to 153 yards (140 meters) away.	MULTIPLE PAIRING OPTIONS This radar works seamlessly with your Garmin Edge bike computer or compatible smartphone as well as select Garmin wearables or the Garmin Varia Radar Display Unit, sold separately here.
WORKS WITH THE VARIA APP This smartphone app helps you increase your awareness by providing graphics — plus tone and vibration alerts — that indicate the position and speed of approaching cars.	THIRD-PARTY APP COMPATIBLE When used with a compatible smartphone, Varia radar integrates with your favorite apps, such as Ride with GPS to overlay your maps with rearview radar alerts.
COMPACT DESIGN Easily mount this sleek, compact device on the seatpost of almost any road-use bicycle. The vertical design allows for better leg clearance and a perfectly comfortable ride. .	BATTERY LIFE Time spent charging is not as good as time spent riding. Get up to 7 hours of battery life.

Garmin Varia RVR315 Rearview Radar