After having some problems with my NES, I figured out that the issue was with the AC adaptor. I tried a friend's SMS adaptor and it worked just as great as it ever did.
Now, I have found an AC adaptor with the same plug. Problem is, I'm not the best with electrical stuff and wasn't sure if it would be okay to use. Some of the stuff is the same as the official Nintendo AC adaptor, but there are differences, and I was hoping someone here could tell me whether this will be okay to use with my NES or not...

Input: AC 120v 60Hz 6W
Output: AC 9v 200MA

I know some of that is the same as the official NES AC adaptor, but I'm not sure if the differences would cause a problem.
Any help would be greatly appreciated. (: