It doesn’t have any buttons on the outside, but if you click on the right-front or left-front, it acts like a 2-button mouse. It also has, instead of a scroll-wheel, a little bitty scroll ball. And 2 buttons on the side.
Unfortunately, it’s 50 bucks, and it isn’t even cordless.
Meh. I won’t bother. I’ve been quite content with my single button mouse and see no reason to change unless it comes with a free massage from Kate Winslet or Katherine Zeta Jones.