Works first time without having to download software or set anything! A computer can switch to another by simply touch the keypad, it is very convenient. But be careful: the keyboard and mouse sockets are DIN and today all mice are USB ... I bought a DIN adapter / USB for mouse but it does not. I advise you to take rather the top model in the range has a USB input. So .... I juggle with my 2 mouse;) (but better that than to juggle 2 keyboards).