GARMINVaria, Rearview Radar, Bundle

Vehicle Approach Indication: The Radar Display Unit (RDU) and compatible Edge cycling computers indicate up to 8 vehicles approaching from behind, giving the rider information on distance and rate of approach. Auto Tuning: Taillight illuminates and flashes when approaching vehicles are detected for an added measure of safety. Vehicles approaching from behind are the number one cause of bicycle/vehicle crashes in the United States. Thread Level Indicator: Shows the approach speed and relative distance of one or more vehicles at a time. The world's first bike radar that warns vehicles approaching from behind up to 140 meters away Dimensions: Radar Display Unit: 60 x 34 x 19mm; rear light: 73 x 44 x 23 mm