If you are the sort of person who constantly loses things, like your car (I have done this a few times in large car parks), then you might need one of these Ecco GPS Keychains.

The Ecco GPS Keychain can be programmed with up to 3 different locations at a time, so when you leave your car just set it up and you will easily be able to find your way back to it.

It lets you know which direction you need to go to find your car, and will tell you exactly how close you are to your car, if you want one they are available for £69.95 about $113 from Firebox.

via Coolest Gadgets