Let's be honest, we’ve all been in this situation one time or another: You walk out of the store after a pleasant day shopping. You've got your purchases secured and in tow. Now, you just need your car....by the way, where is your car?

No worries. Fortunately, you've got a electronic key that you can use to honk your horn. Unfortunately, the parking lot if the size of an Olympic stadium, and you're out of range.

It's time to use your brain (literally).

Electronic car keys send out electromagnetic waves that are about a meter long. And as we all know, when you walk away from your car, this signal gets weaker and weaker. Thus, the key has a limited range; however, the range increases when you place the key against your head. Find out why in the video below.

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