The 2.4 GHz wireless technology works up to 30 feet. This provides the reliability to ensure your other wireless devices will not interfere with your mouse. Contoured body with soft canvas fabric cover comfortable grip-feeling without any fatigue for long time use. The compact and durable design will make this mouse become your ideal choice when you travel. The compact size makes it easy to store your mouse in your laptop bag or briefcase while on the go. Optical sensor technology improves precision and even lets you work on most surfaces like marble wood and leather without the need of a mouse pad. With an optical resolution of 800/1200/1600 DPI you can browse comfortably basically on any surface. With the built-in Auto-Sleep features you can automatically maximize your battery life when your device is not in use. With three selectable DPI options from 800 to 1600 users can change their desired DPI settings.