USB 2.4Ghz Optical Wireless Computer Mouse For PC Laptop Desktop(black) 3 Buttons: Left, right and DPI switch (allows for adjustable movement sensitivity) Slim, ergonomically-designed 2.4 GHz wireless mouse ideal for home or office use Powered by one AA battery (not included) 2.4GHz digital wireless transmission, operation distance is up to 10 meters 800 dpi/1600 dpi, cursor speed adjustable