Add eight RS232 serial ports (DB9) to your computer through two desktop PCIe expansion card slots 8 port PCI express serial card with 16C1050 UART High-speed data transfer rates up to 921.4Kbps 8 port PCIe serial card comes pre-configured for low-profile and includes two full-profile brackets for versatile use with low profile and standard computer cases PCIe serial card supports 256-byte depth FIFO per transmitter and receiver 8 port PCIe serial card with Lifetime Warranty