HP M160 USB Wired Gaming Optical Mouse with LED Backlight, 1000 DPI, 3 Buttons and Press Life Up to 3 Million Clicks, 1 Year Warranty (843W8AA, Black)

With or without a mouse pad, the mouse moves easily for precise optical tracking, use the scroll wheel for fast, precise tracking to navigate through your work effortlessly
Just plug the cord into your computer's USB port and you're ready to go
Adjust your DPI setting (1,000 and 1,600 DPI), high-definition optical sensor delivers smooth, responsive cursor control, so you can work with precision and confidence on a wide variety of surfaces
3-buttons, scroll wheel (acts as third button);