Most new cars come with sensors to let you know when you're about to back over something. Unfortunately for owners of older rides, adding that capability to a car that didn't come equipped with it has been an expensive undertaking. Until now. The FenSens Wireless Parking Sensor is both affordable and easy to install. It packs its sensors into a standard license plate holder, installing in as little as five minutes and connecting to your phone wirelessly. Once it's set up you'll get a visual readout of how far any objects are from your bumper, as well as audible alerts that increase in frequency the closer you get to an object, all without running a single cable.