The screen is glass or some type of fragile plexiglass/plastic composite. Meaning it will break or shatter if you drop it. I searched high and low for an otterbox or survival case to protect it, I couldn't find one for this tablet. Probably because the otterbox cases for tablets are already $50-60 and that's pretty close to the tablet's price already. The wireless card on the tablet is a standard speed wifi card. As for it being fast, that is another story. The wifi is fast enough as long as you have a good wireless network in your home, but the browser is a little slow and pages load a little slow because the operating system and browser are clunky. You will not be impressed with this tablet's speed. Expect the browser to try to catch up with your wifi. It does have a great value, just remember that you get what you pay for.
It seems to be made of glass and it works grreat on Wifi! Have had no issues with connectivity!