Adding a third monitor, what product I need to get?

I have two monitors and I would like to add a third one. What product I need to get? Thanks

Thanks for the question.

Just check the max resolution of the third monitor you have, and then pick either the $49.95 UGA-125 (DL-125 chip supporting modes up to 1440x900/1280x1024) http://plugable.com/products/uga-125/ or the $69.95 UGA-2K-A (DL-195 chip supporting modes up to 2048x1152) http://plugable.com/products/uga-2k-a/

The products are otherwise identical in terms of drivers and what they include.

Thanks again!