Anti-Spy Pinhole Camera Wireless RF Bug Detector (0~6GHz)

Pros: This is a sweet device for detecting almost everything that puts out electro-magnetic radiation. It has a very usefull sensitivity pot, that really makes the difference.
I used it to detect leaks from the microwave oven, and when it's started, this thing goes crazy.
I also tested it with a WI-FI router. a GSM jammer and it simply WORKS.
It also has the possibility to vibrate instead of beeping, and comes also with headphones. All in all, it does what it promises, at a decent price.

Cons: Can't find any.

Other: Buy it, it's woth every penny !

Pros: It will find some stuff, but only if you pretty much run your antenna right across it (touching it or within an inch).

Cons: At full sensitivity I have to get within 1-2" before it picks up the wifi signal from my computer, i-pod touch, or home wifi transmitter. Unless you're willing to sweep the antenna over every single inch of your home, in every nook and cranny, I doubt you're going to find anything clandestine with this item.

Other: I wouldn't waste my money on this model. I'm sure there's a better product out there. It may cost more, but it's worth it if it actually works and has some actual effective range (like 2-3').