The PS22USB PS/2 to USB (Universal Serial Bus) Keyboard & Mouse Adapter converts a USB (Universal Serial Bus) keyboard & mouse to PS/2 connections allowing you to connect a newer USB (Universal Serial Bus)-based keyboard & mouse to legacy systems that only have PS/2 connection ports available. No additional cables required for setup Two USB (Universal Serial Bus) connections for separate keyboard & mouse input Supports the use of combo 2-in-1 keyboard & mouse connections (wired only) Plug-&-Play compatible No driver or software required No external power source required