5 + 1 button mouse. DPI button for 4 changeable levels of dip resolution(800/1200/1600/2000), forward button, backward button, right mouse button, left mouse button and large high-precision scroll wheel. Both keyboard and mouse are ergonomic design for long-term comfortable use. Special padding on both keyboard and mouse to add stability. High-quality ABS construction to improve durability. SS301 gaming combo includes high-quality LED leather cover design headphone with rich bass surround sound, sharp gaming design keyboard and ergonomic design mouse to provide all you needs and the best gaming experience.