Experience New Levels Of Productivitiy With This Ergonomic Optical Mouse. Its Advanced Optical Sesor Tracking Method Lets You Work On Most Surfaces With Speed And Accuracy. Easily Swwitch Between 4 Dpi Resolutions (800/1200/1600/2400) By Utilizing The Dpi Switch Button On The Top Of The Mouse. There Are Also Two Built-In Internet Navigation Buttons. All Of These Features, Along With Its Ergonomic Design Provide Great Control, Response And Comfort With Minimal Hand Movement. Key Features: Advanced Optical Engine; Adjustable Dpi Switch; Internet Navigation Buttons; Ergonomic Design; Usb Connectivity