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SIIG's DP 4-Port Industrial RS-232 Universal PCI Adapter Card with Power is a high performance adapter card designed to easily add 4 RS-232 serial ports with 15KV protection to your PCI enabled desktop computer. Its serial interface delivers data transfer rates up to 921.6Kb/s, and features 15KVDC ESD protection to protect both connected devices and the board itself from static electricity build-up. The DP 4-Port Industrial RS-232 Universal PCI Adapter Card offers 5V and 12V power output to each serial port for serial devices that require power from the serial port. This dual profile PCI adapter card comes with a spare low profile bracket to install in standard height or low-profile systems to offer the utmost flexibility in system chassis installation.