“RollJam” device is said to allow its user unfettered access to your automobile or garage, via stolen electronic codes.
The concept is fairly simple. The device tricks you into giving it a functional code for your car or garage by making it appear as though the first click of the remote simply didn’t work. By then clicking again, you’re giving it two functional codes. It can then sacrifice one code to unlock your car and keep you from thinking about the fact that you were just hacked.