"The Adesso iMouse X5 RGB Color 7-Button Illuminated Gaming Mouse provides many impressive features. Its ambidextrous design and the programmable driver offer functionalities and practicality for both left and right handed users. Users can program each of the 7 different buttons tailored for their specific applications. Different color illuminations further allow you to game or work in dark environments and add a fashionable and cool look to the mouse itself. The optical sensor also ensures pinpointing tracking for the best gaming performance. Lastly, the palm-grip ergonomic design provides comfort during long usage periods. The programmable driver has a friendly user interface that lets you change lighting options and assign different functions and macros to each of the 9 different buttons. The adjustable weight system allows users to insert US Quarters to the weight compartment to tailor to their most comfortable level. The advanced Pixart 3389 sensor offers pinpointing tracking precision for your various computing and gaming activities. The adjustable DPI switch provides control of the mouse with 7 different customized sensitivities (7 default speed at 400/800/1,600/3,200/6,400/12,800/16,000 DPI). Located conveniently just below the scroll wheel, the DPI adjustment buttons let you quickly adjust cursor speed between the various computer tasks throughout your day."