Single Serial (16550) Port Serial Ports - 1 Weight - N/A OS Support - Windows 95/98/98 SE/ME/NT4.0/2000/XP/Server 2003 OS Support - Windows 95/98/98 SE/ME/NT4.0/2000/XP/Server 2003 OS Support - Windows 95/98/98 SE/ME/NT4.0/2000/XP/Server 2003