SIIG CyberSerial 4S PCIe dual profile 16950 serial I/O card provides four additional RS-232 serial ports to your PCI Express-enabled computer system. This high-performance card features a 128-byte FIFO buffer for fast data transfer and supports Windows-based systems. Each port can be independently configured as a standard RS-232 port or with 5V/12V power output to support various serial devices. The package comes in a factory-sealed box and includes a fan-out cable and a low-profile bracket for versatile installation in either standard or small form factor systems. Part number JJ-E40011-S3 ensures compatibility with professional and industrial connectivity needs.