Logitech Advanced 2.4 GHz wireless connection Wirelessly connects to the included Unifying nano-receiver, which plugs in to your computer’s USB port and works across an array of Unifying-compatible wi Logitech Advanced Optical Tracking technology Improved LED light positioning makes this optical mouse more responsive and accurate. 3 buttons Provide access to frequently used commands and functions for powerful control. Scroll wheel Enables smooth, fast movement. Maximum of 1000 dpi Lets you find the perfect sensitivity. Compatible with most versions of Windows Works with most PCs.