Then, as the prior reviewer noted, the two-button function seemed as usual for any other mouse. However, if I put it in 'pc' mode, it would lock up, or, if started there, would not even be recognized. Only by setting the switch to 'ms' mode would it recognize.

Like the prior poster, I could not make the middle button do *anything* - even though the setup page was quite complete with all the options shown, I could not make the button do anything.

The lack of documentation is appalling. Nowhere did I find any reference to how to make the scroll function work. The scroll button seems to be only a one-way (forward end moving, rear hinged) possibility, but the setup page refers to both axes - without any mention of how to engage it or reverse it.

It goes back tomorrow if I can't find their site to download a new set of drivers to test.

I *did* like the ps2 with serial adapter feature, as I have machines with both, and that's usually an extra-cost item...