Core Wireless Convertible Mouse - White Compatible with Windows 7 or later and Mac OS X 10.4 or Later 2000 DPI, for fast responding speed and precise scrolling. Design for web scrolling making searches and browsing easier. New Optical sensor design to enhance speed and efficient control. Unifying receiver with special magnetized design for the receiver, to store it so it never gets lost. Long battery life to eliminate the need to replace batteries in a short amount of time. Convertible and fold-able mouse. Makes it easier to carry around.