The 3 Level DPI switch allows for different cursor sensitivities for your personal needs while providing accuracy and precision to maximize your tracking performance. Multi-colored LEDs illuminate the edges of the mouse which gives the mouse a unique look and better accessibility in low-light environments. Optical sensor technology precisely and accurately tracks cursor movement and lets you work on most wood, marble and leather surfaces without the need of a mousepad. The USB cable is retractable making the tangling of wires a thing of the past. Pull cable at desired length with a maximum pull of 2.5ft.