Garmin Varia Rearview Radar RVR 315

This rearview radar pairs with your Edge bike computer or compatible smartphone to alert you of vehicles approaching from behind. Reliable rearview radar lets you ride like you know what's coming. One radar. Multiple display options. Pair it with your compatible Garmin device, your phone or both. Don't have an Edge or other compatible device yet? No problem. The Varia app has you covered. It's small, it's easy to mount, and it works with just about any bike. Get more life out of your radar with up to 7 hours of battery life.