The Pro Optical Mouse from Inland is the latest technology in mouse design. No need for a mouse pad-the Pro Optical Mouse uses an infrared sensor to detect the surface! The infrared sensor lights up on the bottom tip of the mouse to indicate it is detecting the surface. With no ball or other parts to clean, there will be no more skipping of your mouse causing you frustration. The Pro Optical Mouse offers smooth and precise motion! Other features include three programmable buttons for navigation of the Internet, programmable scrolling wheel button, a command button, and a pop-up menu button.