Yea, pretty much what rweso said...
They work great though! You can control up to 8 appliances/lights at once, and it's VERY simple to use. Just plug your prop into the module and plug the module into a plug outlet, and your set! Whatever number you set the module to, the remote automatically corresponds with it.
They'll control just about anything I think. We're using it to control our moving head - to turn it off when no ones around to prevent overheating.
They're inexpensive though, which is their best feature! Actually, it looks like they're on sale now.
http://www.radioshack.com/product.as...5Fid=61%2D2410
-Brian