From Manufacturer
The Macally ICEMOUSE3 Wired Mouse features a 1000 dpi optical sensor as well as three soft-click buttons and a scroll wheel. The ergonomic design works with both left and right handed people. Connect the mouse to your computer via the 5' USB Type-A cable. The mouse works with Mac and Windows computers, no drivers required.
1000 dpi precision optical sensor for precise and smooth control
3 buttons and scroll wheel