PLUG AND PLAY -- Plug & play! Just pop in the aa battery (NOT included) and plug the nano receiver to your computer, then it will get it job done, no drivers needed Silent button & Durable Design - Responsive buttons provides very soft click with less noise, no more disturbing for others with the loud clicking sound ,Portable design make it easy to store in bag for traveling. UNIVERSAL COMPATIBILITY -- Work perfectly for Windows XP, Windows Vista, Windows 7, Mac OS X 10.4 etc. ?Pls Note: this mouse is connected by USB receiver, will NOT compatible with Macbook Pro or other devices which only have Type C ports? 3 Adjustable DPI - Choose between 800 1200 1600 or 2400 DPI (Dots Per Inch) easily. Simply push the DPI button to set your desired sensitivity settings. LIFETTIME RISK-FREE WARRANTY: We promise a Life-time Money Back or Free New Replacement guarantee if you received defective products or have any questions with this wireless mouse.