The TAA Compliant Ergonomic USB Mouse (VP3830) is a 5 - button optical mouse providing selectable esolution, Left, Middle and Right click keys, Forward and Back keys, and a Scroll -Wheel for document navigation . Its ergonomic vertical design helps reduce the wrist stress resulting from prolonged computer use. A left handed version (VP3835) is available separately. Windows and OS X compatible. Features: Ergonomic USB Mouse. Selectable resolution (800, 1600, 2400 dpi) . Left, Middle and Right click buttons. Forward and Back keys. Scroll-Wheel . TAA Compliant. 2 - year manufacturer's warranty. Windows & OS X.