Features:PCI Express x1 bus slot for installation on a variety of PCI Express slots Including 4x, 8x, and 16x)Support a variety of mainstream operating systems, including Windows, MAC- and Linux. 8 RS-232 serial ports support up to 230.4Kbps communication speed and provide modem control signals to ensure compatibility with a variety of peripheral serial devices.Support for DOS, Windows 8, Windows 7 / Vista / XP / 2000 / Server 2003-2008 32/64-bit, Linux & Mac OS / X 10.5 and other operating systemsSupports up to 8 RS232 serial ports.Each serial port has a built-in FIFO100% brand new and high qualityPCI-Express expands 8-port RS232 serial ports and is designed for POS and ATM applications and is the preferred choice for industrial automation system integrators.Package Includes:1 x PCI-Express I/O 8-port Serial Card1 x Fan-Out Cable1 x User ManualSpecifications:Compliant with PCI-Express Specification Revision 1.1PCI-Express Single-Lane (x1) bus bandwidth 2.5GbpsSupport serial port number change,Card Size:approx:93mm (L) x 65mm /3.66x2.56inBaffle Length: 12cm/4.72inSerial Port (RS232) interfaceSupports 8 RS232 Serial ports on 1 Fan-out cablesTVS on each signal of RS232 port - for the protection of 200W Voltage Surge and +/-20kV ESDOn chip 256-byte depth FIFO in transmit, receive path of each portTransfer data rates up to 921.6Kbps on each portSupports hardware and software flow controlSupports 5-, 6-, 7-, 8- bit serial formatSupports even, odd, none, space & mark paritySupports 1, 1.5 or 2 Stop bit operationnote:With CD Driver.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you