The ps22usb ps2 to usb keyboard and mouse adapter converts a usb keyboard and mouse to ps2 connections allowing you to connect a newer usb based keyboard and mouse to legacy systems that only have ps2 connection ports available no additional cables required for setup two usb connections for separate keyboard and mouse input supports the use of combo 2 in 1 keyboard and mouse connections wired only plug and play compatible no driver or software required no external power source required