CH382 Is A Dual Serial Port And Printing Port Chip For Pci-Express Bus,Include 2 Asynchronous Serial Port Compatible for 16C550/16C750 And An EPP/ECP Enhanced Bidirectional Parallel Port.Asynchronous Serial Port Provides An Independent 256-Byte Fifo Buffer For Sending And Receiving,Supports A Communication Baud Rate Of 8mbps,Can Be Used For RS232 Serial Port Expansion Of The PCI-E Bus,Pci-E High-Speed Serial Port With Auto Hardware Rate Control,Serial Port Networking,And RS485 Communication,Etc The Same Chip Can Be Configured As Dual Serial Ports, Single Parallel Port/Printing Port, Or Dual Serial Ports Plus Parallel Port/Printing Port Of The PCI-E Bus. Provides A Two-Wire Serial Host Interface, Which Can Be Connected To A Serial Eeprom Device Similar To 24c0x For Storing Non-Volatile Data. The Device Identification (Vendor Id, Device Id, Class Code, Etc.) Of The Pcie Board Can Be Set In The Eeprom Device. 3.3V Power Supply Voltage, Main I/O Pins Support 5V Withstand Voltage, And Support Serial Port Low-Power Sleep Mode. Description: Parallel port: Supports for SPP, Nibble, Byte, PS/2, EPP, ECP and other IEEE1284 parallel port/printing port working modes. Supports two-way data transmission, supporting transmission speeds up to 1M bytes/second. Operating system: for Windows 98SE/ME/NT 4.0/2000/XP/Vista/Server2003/Win 7, Linux Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown Package Contents: 2 x CH382L PCI-E Parallel Port Card 2 x Short Iron Piece 2 x CD-Driver