Sengu SG-MU1063-N 2.4GHz Bamboo Wired Optical Mouse Healthy Sweat-resistant Anti-radiation Wired Mouse Bamboo qualitative material instead of plastic, improve the degradability, achieve the goal of the green environmental protection 3 buttons and a smooth scroll wheel on the mouse: left, right and a middle click button on a scroll wheel USB compatible with windows 98 and other updated versions, PS/2 compatible with all systems, except the MAC OS strong practicability, smooth surface, warm in winter and cool in summer, static resistance Convenient hot keys for easy access to internet, e-mail, mute, and calculator