Actually, in tech it is very acceptable to use mouses instead of mice. You can use either but I can say after decades of working in tech I have never heard mice used and it just doesn't sound right. The best way they could have said it so to skirt around it would have been to say "A" mouse is nice"Mice," not "mouses." Sorry.
Why are you getting rid of it? If you like it and it works, use it.

