I have an HP Slate 21 Pro. It's an all-in-one android pc with a touchscreen. HP abandoned it long ago at version 4.something. It was slow, and buggy. But, you can switch it to HDMI mode which lets you use it as a monitor. I slapped this thing to the back of it with some servo tape and connected it via HDMI and USB. The USB connection lets you still use the touch screen. No drivers required.It's fast with no lag, and the kids no longer complain about YouTube being slow or other problems like having to reboot regularly.