GO ERGO Optical Desktop Mouse 49017 Move comfortably around your desktop with Verbatim's GO ERGO Mouse. This desktop mouse features a modern ergonomic design with a convenient thumb support area for the right hand. The grip is rubberized on the left side of the mouse to provide comfort and extra control, whilst the scroll wheel has a rubber coating on it to help on-screen accuracy. The GO ERGO Mouse is USB Plug 'n' Play and features a 1000dpi high definition optical lens for smooth and accurate screen navigation. Features: Modern, easy-grip design with convenient thumb support 1000dpi high definition optical lens USB Plug ‘n’ Play Verbatim 2 Year Warranty Specifications:Dimensions: 116mm x 76mm x 41mm (L x W x H) Weight: 95 grams Interface: USB dpi (dots per inch): 1000 System requirements:Windows 7, Vista, XP, 2000 Mac OS X 10.4 or higher