The Garmin Varia RVR 315 Rearview Radar sensor is a stand-alone Varia radar unit without a built-in taillight. The Varia radar syncs with Bluetooth or ANT+ enabled Garmin devices and provides a visual and audible alert when a car is approaching.
This 3rd generation Varia adds Bluetooth connectivity, longer battery life, a new Varia mobile app & 3rd party app compatibility.
Battery Life: 7 hours
Dimensions: 49 x 72 x 24mm