1. Stable Performance: For CH384L is a MiniPCIE (PCIE) bus with four serial ports and printer ports, including four asynchronous serial ports compatible with for 16C550 or for 16C750 and an EPP/ECP enhanced bidirectional parallel port 2. Multiple Serial Ports: The Mini PCIE controller card can add for CH438 chip to expand up to 24 serial ports. Asynchronous serial port provides independent 256-byte FIFO buffer for transceiver 3. Reliable and Practical: The industrial mini PCIE controller card supports IrDA infrared codec, supports 8Mbps communication rate 4. Widely Compatible: The 4 parallel port PCIE card is used for MiniPCIE bus RS232 serial port expansion, PCIE high-speed serial port with automatic hardware control, serial port networking, RS485 communication, IrDA communication, parallel port, printing expansion, etc. 5. Supported Systems: The 4 parallel port PCIE card supports for Win 98SE, for Win ME, for Win NT 4.0, for Win 2000, for Win XP, for Win Vista, for Win Server2003, for Win 7, for Linux systems