Siig JK-US0E12-S1 with Led Backlit, Wired Optical Mouse, 4 Buttons, USB, Black/Blue Wired USB mouse with high resolution optical sensor Ergonomic design improves palm and wrist support 4-button with scrolling wheel great for web, data browsing or gaming control 2-level adjustable optical sensor supports 800 DPI or 1600 DPI resolution and provides smooth and precise movement Woven braided USB cable enhances durability and shielding, integrated ferrite core minimizes signal interference and crosstalk