You dont buy anything, send this mic back and buy a normal one for same money you paid for the trash.

This one is 99$, its USB like you need, dont buy ANY microphones that plug into your sound card they WONT work properly, micrphones need audio interface to work, so buy this mic [Its recommended model actually by this reddit, for new users]

https://www.amazon.com/Behringer-Professional-Large-Diaphragm-Condenser-Microphone/dp/B001QXCYZY

This: http://www.amazon.com/dp/B002VA464S

OR

This is pretty great and at a better cost, but you'll have to do some magic in sound mixing because it may be a bit quiet: http://www.amazon.com/Behringer-C-1U-Condenser-Microphone-Cardioid/dp/B001QXCYZY/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1360408988&sr=1-1&keywords=Behringer+C-1+USB

I've assumed you're looking for a USB mic here by the way. The amp that you'd need for traditional microphones would cost you around a $100, but you can get better gain with them, and an equivalent mic that doesn't have USB is usually slightly cheaper, so that's stuff to keep in mind.

have fun recording.