(What is it with this 'spamwood' stuff that everyone is talking about ...)
Anyway, DYI Novice, I suggest you spend you $$$ on an E-Z Check Plus Circuit Finder. It's about $55, much more than the one at Home Depot, but you get a 3-prong version of what you want that checks the circuit as well as the circuit finder. Obviously, it won't work on a 2-prong outlet. It's a 2-in-1 tool, and useful if you're currently in a "2-prong house" and want to go to a 3-prong house. If you're staying with the 2-prong house, Dr Home's recommendation is what you want.
To see what I'm referring to, go to Ideal Industries. They make, among other things, electrical test equipment. The Circuit Finder is down towards the bottom of the WEB page. They have a 2-prong AND a 3-prong unit too. I think the one you see on the WEB page is the 2-prong one. If you want the 3-prong one, make sure you ask for it!