dFence is the 21st century solution to vehicle theft. The biggest-selling vehicle recovery system uses decades-old radio technology that’s essentially "asleep" until you discover that your vehicle has been stolen. This could delay recovery for hours or even days.dFence never rests. It uses state-of-the-art GPS technology that alerts you the instant your vehicle is moved and allows you and the police to track the location, speed and direction of the vehicle in real time online. This means you can get your vehicle back in minutes, and that thieves will learn not to even go near a vehicle protected by dFence GPS technology.