What you are viewing is USB 2.0 Extender Extra Dual Monitor Graphics Card Adapter. The USB display adapter supports Windows 2000 SP4/XP SP2/Server 2003/Vista/Server 2008. And it can be used to connect an additional monitor (LCD, CRT) or projector to your computer via USB 2.0 port. This USB display adapter creates multi-display multi-view systems without disassembling your PC, no need to struggle with compatibility issues. It can output VGA/SXGA format via D-Sub port. The USB display adapter also can be connected to CRT/LCD monitors and TV screens. With compact and portable design, this USB display adapter is easy to use and will extend your desktop workspace. The USB display adapter can be powered directly by USB port, no AC adapter required. And it supports three display modes: primary, extended, and mirroring. We are sure it will bring you much convenience. Really a great choice for you!