5 ADJUSTABLE DPI LEVELS Adjust DPI（2400/2000/1600/1200/800）by the DPI button, control your movetation speed freely and conveniently-Plug and Play, no need any driver. STRONG DURABILITY AND LONG WORKING DISTANCE 2.4GHz Wireless Technology, increase working distance of up to 50ft 500,0000 Times keystroke tested and. ERGONOMIC Contoured shape keeps your hand comfortable even after long hours. And the USB Nano Receiver can be stored in the the back slot of the mouse. WIDE COMPATIBILITY Compatible with most system including Windows, Mac and Linux. Fit for Notebook, PC, Laptop, Computer, Macbook and other devices. LONG BATTERY LIFE AND AUTO ENERGY-SAVING SLEEPING MODE Up to 15 months of battery life virtually eliminates the need to change batteries.(Battery life may vary based on user and computer conditions.) The Auto Switch Off function helps you save energy as your Wireless Mouse will switch off when your PC is turned off or the receiver is disconnected.