SIIG 4-Port RS232 Serial PCI with 16550 UART Model JJ-P04511-S1 Type: PCI to Serial Port Card External Ports: 4 x Serial Ports Data Transfer Rate: Up to 230Kb/s Operating Systems Supported: Windows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit) / Server 2003 & 2008 (32-/64-bit) / Server 2008 R2 / 2000 / ME / 98SE / 98 / DOS Specifications: Compliant with PCI Local Bus Specification, Revision 2.3 Supports data transfer rate up to 230Kb/s Supports up to 256-byte FIFO buffer Chip: Moschip MCS9865 Ports: 4, 9-Pin, DB9, RS232, Serial, Male, External Form factor: Full height Certifications/Standards: FCC, CE, RoHS Dimensions: 4.72 x 5 x 0.71 Weight: 0.175 lbs. Package Contents: 4-Port RS232 Serial PCI with 16550 UART Connector bracket for port 3 & 4 Driver CD User's manual