Extender Model numbers.

I bought a range extender that the site does not appear to recognise. The pictures refer to it as the "Zen Booster" but I can find no model number anywhere on it! Has anyone else had this problem? If so, how did you get around it?
I even tried the name and the site said it did not recognise a product by that name! I entered the MAC number and got the same responce! the only numbers left were the "default settings" and the WiFi4 on a lable on the face! (again, unrecognised!)
I am as tech savy as bacteria and help for setup assumes that I have "grown up" with tech it seems. I can get to where I wish to be, email, do my bookwork and find a few things here and there, but that about covers it!
Any help would be appreciated!    (and, probably, hounded as I become hamstrung by other problems I cannot conseive an answer to!)