Look in your pocket, purse, bag, or junk drawer, and chances are you’ll find a key fob. The basic ones lock and unlock your car’s doors. The fanciest do much more. But no matter which kind you have, ...

Don’t you hate that feeling, the one you get when you have just realized that you have no clue where you may have left your keys? If you are unlucky enough to have lost them in a public place, odds ...