Price history on Walmart.com for
Impulse - Collision Alert Safety System | Activates on Hard Braking | Wireless | Universal Fit |See on Walmart
Introducing Impulse, the world's first Collision Alert System... for the driver behind you. Impulse alerts following drivers with ultra-bright, pulsing red LEDs that activate upon hard braking. It has a motion sensor and battery, so it simply sticks to your vehicle's rear window, completely wire-free. The installation is easy, it fits nearly any vehicle, and the batteries last four years for the average driver.... read more.