Features: PCI Express x1 bus slot for installation on a variety of PCI Express slots (including 4x, 8x, and 16x). Supports a wide range of common operating systems, including Windows, MAC, and Linux. 8 RS-232 serial ports support communication speeds up to 230.4Kbps and provide modem control signals to ensure compatibility with a variety of peripheral serial devices. Supports DOS, Windows 8, Windows 7 / Vista / XP / 2000 / Server 2003-2008 32/64-bit, Linux & Mac OS / X 10.5 and other operating systems. Supports up to 8 RS232 serial ports. Each serial port has a built-in FIFO. Brand new and high quality. PCI-Express expands 8-port RS232 serial ports and is designed for POS and ATM applications, making it the best choice for system integrators in industrial automation. Specifications: Compliant with PCI-Express Specification Revision 1.1. PCI-Express Single-Lane (x1) bus bandwidth 2.5Gbps. Supports serial number modification. Card Size: Approx: 93mm (L) x 65mm / 3.66x2.56in. Baffle Length: 12cm / 4.72in. Serial Port (RS232) Interface. Supports 8 RS232 serial ports on 1 Fan-out cable. TVS on each signal on the RS232 port - for protection against 200W voltage surge and +/-20kV ESD. On-chip 256-byte deep FIFO in transmit, receive path for each port. Transmits data rates up to 921.6Kbps on each port. Supports hardware and software flow control. Supports 5-, 6-, 7-, 8-bit serial formats. Supports even, odd, none, space & mark parity. Supports 1, 1.5, or 2 Stop bit operations. Note: Includes CD driver. Please allow 0-1cm error due to manual measurement. Please ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x PCI-Express I/O 8-port Serial Card 1 x Fan-Out Cable 1 x User Manual