Type: PCI Express to Parallel / Serial Port External Ports: 1 x Parallel Port Internal Ports: 2 x Serial Ports Data Transfer Rate: Parallel Port: up to 1.5MB/Sec Serial port : up to 230400bps Operating Systems Supported: Windows 2000/ xp /server 2003 32/64 bit Dimensions: 1.5" x 8" x 5.5" Weight: 0.5 lbs Features: Compliant with PCI Express Base Specification 1.0a Supports standard parallel pot(SPP). Enhanced parallel port(EPP) & Enhanced Capability port(ECP) Parallelate tranfer rate up to 1.5MB/Sec Supports 2 x 16550 Fast UART serial port Serial date transfer rate up to 230400bps Connectors: 1x 25 Pins parallel connector; 2 x 9 Pins serial connectors.