Perixx PERIMICE-519 Vertical Mouse with Silent Click and Left-Handed DesignPERIMICE-519 is perfect for anyone experiencing wrist or forearm strains. This mouse reduces the overall muscle used while operating a mouse to decrease less muscle strain compared to a standard mouse. The mouse is crafted following ergonomic principles for optimum comfort. The click is silent, at the same time it gives a comfortable clicking feedback.Dimensions: 4.13 x 2.64 x 2.28 inches (10.5 x 6.7 x 5.8 cm) Weight: 0.23 lb. (108 g) System Requirements: Supports HID (Human Interface Device) spe, one free USB port, Windows 7, 8, 10, and later versions (Note: All the features will work with Mac operating system)