Penguin Vertical Mice, Wired & Wireless and Ambidextrous

Features:  Naturally Comfortable: the vertical alignment encourages a more ergonomic operating position. Ambidextrous Design: Central 'bow-tie' switch allows for easy transition between right and left handed use. Easy-glide symmetrical base allows the user to rest either hand comfortably alongside the vertical structure, encouraging the use of the larger muscles in the fore and upper arm to maneuver the mouse with precision finer movements performed by the hand and finger muscles. Precision performance laser: Provides accurate tracking on typical work surfaces. Performance laser tracking with variable DPI settings (400, 600, 800, 1600) allows flexibility for different types of applications Easy and precise scroll wheel for fast and accurate document scrolling; also includes auto-scroll feature Specifications:  Plug & Play USB 2.0 - Windows XP, Windows 2000, Windows Vista, Windows 7, Windows 8, Windows 10, Mac OS X, Linux Available in three sizes in wired and wireless - meas