The Auto Detective pen detects wireless and RF signals. The light starts blinking when it detects "signals within the ranges of 900/1200/1300 and 2400/2600/3000MHz". The faster the blinking the closer you are to the spy device you're detecting. As an added bonus it's supposed to have some feature that helps detect counterfeit bills. The unit runs $16 and is made in China. I've already placed my order. I have reason to believe my girlfriend bugged the house because she suspects I'm cheating. Which I am, but she'll never catch me. The bag-lady and I only make love at the bus-stop. I don't invite her over because she smells like urine.
Auto Detective Pen to Identify the Rat in your Crew [uberreview]