It's a model 4000. The new keyboard is OK, and I have to get used to it, but as an old geezer, my learning curve has flattened out. I'll continue to play with it, and may even get to like it. 👍 I'll also see if I can get the z to function again, as cleaning it restores brief function. I can get a used model 4000 on Ebay and may try that.