General Spec Type wireless mouse Cable Interface wireless Compatibility Apple Mac and other PCs Others zero-delay and 800/1200 CPI optical engine (with a CPI switch) Features 2.4GHz wireless transmission high precision optical mouse. No mouse pad required, give smooth, precision motion on virtually any surface. Agree with the palm arc, comfort for either hand user, ergonomics design. 0-10 meters working range. Work with two AAA alkaline batteries (not included). With power switch, more economical and convenient for power command.