Benefiting from a sleek ambidextrous design & great features including high resolution optical technology the Microsoft Compact Optical Mouse 500 is perfect for everyday computing & mobile processing. Compact the mouse is the right size for easy storage & transportation. Fit it inside any laptop bag or case without taking up too much room or use it with your desktop computer when space is tight. Navigate your way through documents & webpages quickly with the smooth transitional scroll wheel eliminating the need for the on-screen bar. Working comfortably in both hands the ambidextrous design is shaped to optimise comfort & remove unnecessary catches & grooves. Using high-quality optical technology the mouse tracks up to 800dpi delivering accurate smooth & reliable accuracy. Protected by Microsofts 2-year warranty youll have peace of mind knowing youre covered if anything goes wrong with the mouse. Windows XP / Mac OS X Operating Systems or Higher 1 x Free USB (Universal Serial Bus) 2.0 Port