Purchased an extra Intelligent Key to hide in my Ford Edge vehicle in case of loss of the original. O course entry can be made to the vehicle via the keypad device. The problem is that it must be stored in such a manner as to make it unrecognizable to the system. One way to do so is to wrap it up in MYLAR, a material which blocks the signals from entering or escaping. Party balloons are made of MYLAR and of course can be easily obtained. I don't know how many layers it takes, I just wrap the intelligent key up in the material, put a rubber band on it and hide it in the vehicle. It works!