The Video Seeker lets you see behind walls, under furniture, etc.

From General Tools comes their Video Seeker Systems. These devices look a little like an electric drill, but its function is very different. It lets you view behind & under things you can’t see with the naked eye. You aim a flexible probe with built in LED’s to see behind walls, under cabinets, etc. on a video monitor that’s included. The most deluxe model (under $400) let’s you record the results on an SD card & features a wireless TV monitor. You can also watch the playback on the monitor. There's also a way to shoot still pictures as you examine with the probe.  Is that AC wire inside the wall frayed? Is there mold forming behind the walls because of that dreaded Chinese dry wall? Now you can know! There are 3 models, the 200, 300 & 400. On the air I showed the model 400, which has the deluxe features mentioned above. The 38” long probe is waterproof in case you want to look down a drain or under a boat. (But don’t get the main unit or TV monitor wet!) Comes with rechargeable battery and AC adapter.  

http://www.generaltools.com/Products/The-Seeker-400-Wireless-Video-Borescope-System__DCS400.aspx