I just got a Kobo Arc and wanted a case to protect it. Hard to find, with everything made exclusively for other more popular (/expensive) tablets. I was hoping to get one with a keyboard. Found one that fit and had a keyboard!! It's a Proscan 7" Tablet case with keyboard. But it doesn't seem to work!! All it says is "Connects to your 7"tablet via USB 2.0 A-Type Male Adapter. Please make sure your tablet has a USB Type A Female to accept this plug type. Also, your device must have a USB host in order for the keyboard to function." The plug does fit, but I have no idea what a USB host is. Can anyone help?