Multi-button functionality enables users to navigate within and between applications with ease for the ultimate computing experience 2 4Ghz wireless connection for lag-free performance; PC and Mac Compatible Blue LED technology allows for use on virtually any surface with precision and control; Plug-and-forget nano receiver connects mouse to computer Ergonomic design and Contoured shape with easy-grip surface fits comfortably in your hand. Includes 2 x AA Batteries Verbatim has been a trusted brand since 1969 and guarantees this product with 1 year limited warranty and technical support