Convert 1 USB Port to 2 PS/2 Ports Compliant with USB HID spec No power need Fully compliant with PS/2 keyboard /mouse Support USB and PS/2 Plug and Play Also support two PS/2 keyboard or two PS/2 Mouse No software need Support Windows 98/SE/ME/2000/XP/Vista/Windows 7 and Mac OS9.0/OSX/Linux