This USB (Universal Serial Bus) to PS/2 adapter cable converts a single USB (Universal Serial Bus) port into PS/2 keyboard & mouse ports Self powered from USB (Universal Serial Bus) port " Plug & Play" Connectors: USB (Universal Serial Bus) Type A Male to PS/2 mouse port (6 Pin Mini DIN Female) & PS/2 keyboard port (6 Pin Mini DIN Female) Compatible with Windows 95 (OSR2.1)/98/ME/2000/ Server 2003/ Server 2008/XP/ Vista/7 & Mac OS 9.0 to 9.2 & 10