1、Principle: CH382L is a MiniPCIE bus dual serial and print port chip that contains two 16C550 or 16C750 compatible asynchronous serial ports and an EPP ECP enhanced bi directional parallel port, and can also be extended with up to 24 serial ports with the CH438 chip. 2、Two Asynchronous Serial Ports: Two completely independent asynchronous serial ports, compatible with 16C550, 16C552, 16C554 and 16C750 and enhanced. Supports 5, 6, 7 or 8 data bits and 1 or 2 stop bits. Supports odd, even, no parity, blank 0, flag 1 parity, etc. 3、Programmable Communication Baud Rate: Supports 115200bps and up to 8Mbps communication baud rate. Built in 256 byte FIFO buffer, supports 2 FIFO trigger stages. 4、MODEM Support: Modem signals CTS, DSR, RI, DCD, DTR, RTS, can be converted to RS232 level. Support hardware flowing control signal CTS and RTS auto handshake and auto transmission rate control, compatible with TL16C550C. 5、Support: Support serial port frame error detection, support Break line interval detection. Supports full duplex and half duplex serial communication. 1 x CH382L 1P Parallel Port Card1 x MiniPCIE Card1 x CD ROM1 x Short Baffle Item Type: PCIe Parallel Port Expansion CardProduct Material: PCBMain Chip: CH382LInterface: DB 25 Pin MiniPCIEOperating System: for Windows 98SE ME NT 4.0 2000 XP Vista Server2003 for Win 7 for Linux