Connector Type(s): 1 - PCI Express x1, External Ports: 2 - DB-9 (9 pin, D-Sub) Male, Ports: 2, Interface: Serial, Card Type: Standard Profile (LP bracket incl.), Port Style: Integrated on Card, Industry Standards: PCI Express Version 2.0 x1, Serial Protocol: RS-232, Color: Yellow, Material: Steel. Add serial communication support to your desktop computer or Small Form Factor (SFF) system, using this two-port serial card. RS-232 (DB9) support enables control and communication with a serial peripheral device.