Beware of your ports!
The Kwumsy S2 laptop screen extender has real potential if the specifics needed for your laptop weren't hidden and then so damn confusing to figure out. Make sure that your laptop has the right ports!! You need specific port output or one or both of the screens won't work. If that happens you're in for some frustration. The manuals aren't that clear and support is difficult to get. I'm returning it.