The Geek Squad is on the job and they know where you are.

That's because nearly everyone is walking around with a global positioning device in their pocket.

Geek Squad Double agent Jeff Clemons explains how GPS devices work.

He also shows off all the features of common devices like Garmin and Tom Tom models and all of the features included, beyond just getting from point A to point B.

Most have travel information, can track your rate of speed, and have built-in MP3 players.