SYBA PCI-Express RS-232 Serial 4-Port Card, Moschip 9845 Chipset SY-PEX-4S PCI Express: Fully Compliant with PCI Express Base Specification, Revision 1.0a, PCIe Multi Function Peripheral Controller with x1 Lane Interface, Support for D1, D2, D3hot and D3cold, Supports PCIe Power Management. Serial Port: 4x 16C450/550/Extended 550 Compatible UARTs, Supports RS232, RS485 & RS422 Modes, Bi-directional Speeds from 50 bps to 16Mbps/Port, Full Serial Modem Control, 4-port Serial PCI-Express Card. 5, 6, 7, 8 and 9-bit Serial Format Support. Supports Hardware, Software Flow Control. CD Driver, User Manual.