How to use a wireless speedlight trigger?

I have a nikon d80 and a nikon sb800. I want to know if i could use a wireless speedlight trigger (like so: http://www.amazon.com/...004LCGQOW) to tirgger my flash off camera.

There's more I hope you understand. This is only the transmitter… You also need a receiver to mount the flash to.

Also make sure that both are compatible with your Nikon before buying. Many aren't. Also the receiver must have the exact contacts as are on your flash or it won't work correctly.

This thing looks really cheap. If you want quality you're going to have to pay for it.

Why not just put your D80 in commander mode and slave the SB800. But if you must, you need a transmitter in the hot shoe of the camera and a compatible receiver plugged into the flash. And make sure the units are set to the same channel.