Ergonomic Vertical Design - The vertical design provides bettersupport for your forearm minimizing wrist pain that can come from twisting. Adjustable DPI Switch and Back/ Forward Buttons - Switch DPI easily between 1000 and 1600 and access to back/ forward navigation shortcut without driver. Fashionable Ice Blue Illumination - You'll be proud to show off your fashionable iMouse E1 with the "ice blue" illumination contrasting against the glossy black case. Plug-and-Play - Simply plug the mini USB receiver into a USB port and you will be up and running. No drivers required, works with Windows or MacOS.