DESC: Simplify your mobile life. The Logitech Notebook Optical Mouse Plus is designed to go where you go, with built-in cord management for easy packing, all-terrain optical for maximum surface coverage, and shock-resistant bodywork to withstand bumps in the road. The Logitech Cordless Optical Mouse makes it easy to go cordless. Simply plug the receiver into your PC or Mac and forget about snagged and tangled mouse cords. Features optical tracking, a convenient scroll wheel, extended battery life, and a comfortable design. USB and PS/2. Personalize your desktop with color! It also includes 3 changeable snap-on covers.