Mute button-do not disturb family and roommates rest, enjoy a comfortable life. $ Ergonomic design-fits the hand shape, skin-friendly, non-slip, and sweat-proof. $ Convenient controls-scrolling left and right plus zoom allows you to instantly zoom in or out and scroll horizontally and vertically. Very suitable for processing spreadsheets and presentations. $ Zero setup requirements-flexible wired connection means you only need to plug the cable into a USB or PS/2 port-it works right out of the box. $ Precise cursor control-With 1000 dpi sensitivity, you will get precise cursor control, so you can edit documents and browse the Web more efficiently. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.