RS-232 RS232 DB9 Serial COM & Printer DB25 Parallel LPT Port to PCI-E PCI Express Adapter Converter, WCH CH382L Chipset Connects more serial & parallel devices to your computer easily. Stable and reliable chipset WCH CH382L. Standard RS-232 DB9 male serial port compliant. Standard IEEE 1284-1994 DB25 female parallel port compliant. Compliant with Single-Lane (x1) PCI-Express specification revision 1.0a.