Features 1、PCIE to 8 Port: The PCIE X1 to 8 port RS232 serial end interface card adds eight RS232 serial ports to any PC using PCI Express expansion slots for automatic system manufacturing and system integration 2、Interface Design: PCI Express X1 interface (also applicable to PCI‑E X1, X4, X8, X16 slots) 3、High Speed Transmission: Designed for POS, ATM and other applications. Multiple serial port devices such as PCS, terminals, modems, printers, and scanners can be connected. The data rate of each serial port is 921.6 Kbps, each port data transmission rate can get 921.6KBPS 4、Prolong the Service Life: Aluminum alloy heat sink with strong thermal conductivity can protect the chip from burning out for a long time and prolong the service life of the adapter card. In addition, also equipped with 8 cm small case baffle, can ensure the use of large PC case, also can be used for small PC case 5、Function: Provide mediation control signals to ensure the compatibility of serial device peripherals, Multi serial card can be installed in common PC or server, each serial port send, receive 256 byte depth FIFO, support RS232, RS485 and RS422 mode, full serial modem control, support hardware, software flowing control, in all serial ports IEEE1284 support slow IrDA Specification Item Type: Expansion Card Material: PCB Chipset: MCS9900 Port: 8 x Serial Port Interface: PCI Express 1x Slot Applicable To: PCI E x1, x4, x8, x16 Slots Supported Operating Systems: For Windows 10 / 8 / 8.1/7/vista/xp/2000, for Windows Server 2012 / 2008 / 2003, for OS X 10.x (Intel Based, Up to 10.9), for Linux 2.4.x and Later (testing Up to 3.5) Package List 1 x Expansion Card 1 x 8 Port Serial Cable 1 x 8cm Small Case Baffle