This is a general-purpose PCIE serial port card, designed for POS, ATM and other applications, and can be used for industrial automation system manufacturing and system integration. PCE4SOP-A01 provides 4 RS-232 serial ports and modem control signals to ensure the compatibility of serial port equipment peripherals. It is equipped with a 4-port RS-232 serial cable. You can connect a variety of serial devices such as PCs, terminals, modems, printers, scanners, etc. The data rate of each port can reach 115200kbps. PS: This product is a desktop PCI-E expansion card, which requires a free PCI-E slot on the motherboard to install and use. Also, make sure whether the slot is blocked by the image card, and the PCI slot cannot be installed and used. , Never plug it into a PCI slot. Specifications: Single-lane (X1) PCI Express End-point Controller with PHY integrated Compliant with PCI Express 2.0 Gen 1 Compliant with PCI Express card specifications Compliant with PCI Power Management 1.2 Supports four PCI Express functions Supports both legacy and MSI Interrupt Supports ASPM Power Management Serial Port Interface Dual or Quad UARTs Bi-directional speeds up to 25 Mbps per port Full Serial Modem Control Supports Hardware, Software Flow Control Supports 5, 6, 7, 8 and 9-bit Serial format Supports Even, Odd, None, Space and Mark parity Supports Custom baud rate by internal PLL or external clock Supports On Chip 256 Byte depth FIFOs in Transmit, Receive path of each Serial Port Supports remote wakeup and power management features Serial Port transceiver shutdown support Supports Slow IrDA mode (up to 115200bps) on all Serial Ports Supports multi-drop application for 9-bit mode Supports DMA burst transfer Driver installation instructions: Open