Neewer TT520 Speedlight Flash Functionality with Nikon D5100

I'm just giving you a little look at the functionality of the TT520 Speedlight Flash by Neewer. http://www.amazon.com/TT520-Flash-Speedlite-Canon-EOS-1Ds/dp/B004KV4DNK/ref=sr_1_1?s=electronics&ie=UTF8&qid=1319342354&sr=1-1