Advanced wireless technology - 2.4GHz for extended range, 800/1200/1600 dpi adjusts the speed and precision of the mouse. DarkEye sensor technology works on glass surfaces. Pico USB receiver stores neatly inside the mouse for portability. Stick-N-Go mount allows you to clip your mouse to your notebook for secure travel. Designed to use either AA or AAA batteries. 1 x AA battery included.