Reliable Connectivity : The wireless set comes built with Logitech Advanced 2.4 GHz wireless connectivity, giving you reliability plus fast data transmission, no delays/dropouts, wireless encryption
Upgrade : To Logitech MK540 Combo for increased comfort - scooped keys, palm rest, full-size mouse with soft rubber grips and customizable shortcuts
System Requirements includes Windows XP, Windows Vista, Windows 7, or Windows 8 and USB port
Note: The USB connector is available in the battery compartment of the mouse