Ergo-Tech Corded Optical Mouse Innovative design eliminates having to adjust your grip on the mouse. Slightly leveled on the right side where your palm rests while the slope of the mouse falls in line with the fall of your fingers. Three-button (two buttons, one scroll wheel) programmable ball mouse includes Fellowes Easy Point Software which enables you to program all buttons. USB and PS/2 connectivity. Windows 95/98/2000/Me/NT 4.0/XP compatible. Includes 5-ft. cord. Manufacturers three-year warranty. Free Gel Mouse Pad With Order