With 20 buttons, the Logitech G600 MMO Gaming Mouse is the most customizable and easy-to-use mouse specifically designed for mastering your favorite MMOs. Three primary buttons. Twelve thumb buttons. A clickable scroll wheel that tilts. DPI and profile switching. All pre-configured for optimal MMO use right out of the box – no drivers required. Three onboard profiles – two for MMOs and one for FPS – that store button assignments, tracking information, and lighting color settings. Use them as-is or download optional software to tweak them to perfection.