Features: brand new and high quality CH382L is a dual serial port and print port chip for MiniPCIE (PCIe) bus, including two asynchronous 16C550/16C750 compatible chips Serial port and an Epp- ECP enhanced bidirectional parallel port, and can also add CH438 chip to expand up to 24 serial ports. The asynchronous serial port provides an independent 256-byte FIFO buffer for sending and receiving, and supports IrDA infrared codec. The same chip can be configured as four-channel serial port + parallel port/printing port or four-channel serial port + extended multi-serial port of PCI-E bus. 3.3V power supply voltage, main I/O pins support 5V withstand voltage, and support serial port low-power sleep mode. Specifications: Size: approx 12x8x2cm/4.72x3.15x0.79in Serial ports: Two independent asynchronous serial ports, for 16C550, 16C552, 16C554 and 16C750 and enhanced. 5, 6, 7 or 8 data bits and 1 or 2 stop bits are supported. Programmable communication baud rate, support 115200bps and communication baud rate up to 8Mbps. Built-in 256-byte FIFO buffer, supports 2 FIFO trigger stages. Serial port 0 has built-in SIR infrared codec and supports IrDA infrared communication with baud rate from 2400bps to 115200bps. Support external CH438 chip to expand another 8 to 24 asynchronous serial ports, realize PCIE eight serial ports, PCIE twenty-eight serial ports. Support for Windows 98SE/ME/NT4.0/2000/XP/Vista/Server2003/Win 7, Linux Note: Only the above package content, other products are not included. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 0-2cm. Package includes: 1 x MiniPCIE CH382L 1P Parallel Card 1 x Full Height Bezel/Parallel Port 1 x CD-driver 1 x Neutral Kraft Paper Box