The integrated Smooth Optical Tracking sensor offers a 1000 dpi resolution, giving you accurate and precise control on a wide variety of surfaces. You get standard left and right clicks as well as a Micro-Precision 4D scroll wheel that allows you to easily move pages up, down, left, and right. Plug and play design enables you to use the mouse right out of the box with a strong 2.4 GHz wireless connection that gives you up to 33' of range. A single included AA battery gives you up to 18-months of operation, prolonging the lifespan of the M325S.