800 CPI OPTICAL TECHNOLOGY DELIVERS ABSOLUTE PRECISION ON ALMOST ANY SURFACE WITH PINPOINT ACCURACY; 3 PROGRAMMABLE BUTTONS INCREASE FUNCTIONALITY WITH 1-CLICK ON/OFF/CONNECT COMMANDS; ON-BOARD STORAGE COMPARTMENT ACCOMMODATES INCLUDED MINI-USB RECEIVER & 2 AAA BATTERIES; MINI-USB RECEIVER PLUGS INTO ANY USB PORT ; 1-YEAR WARRANTY