This product extends my windows desktop across two monitors as advertised but causes some problems. I run two monitors and I cannot boot my Win7 PC into windows if the adapter is plugged into the monitor. I have to boot with the second monitor disconnected and then plug it in. Also, I found that I could not load windows 7 onto a new SSD if the adapter was connected to my video card. Caused installation hang at black screen near the end of windows installation. No drivers or manual offered.