Product Features.The serial port can realize the power supply of pins 1 and 9. Independent power chip, can achieve 5v/12v power supply without external power supply. The computer host suitable for PCI-E slot can provide 4 standard DB9-pin RS232 serial ports, and the bidirectional speed of full serial modem control of each port is up to 25Mbps, which supports remote wake-up and power management functions. Support DMA burst transfer Operating temperature range: 0 to 70°C or -40 to 85°C (optional) PCI Express Single-lane (X1) PCIExpress endpoint control with PHY integration Compliant with PCI Express 2.0 Gen 1 Compliant with PCI Express Card Specifications Compliant with PCI Power Management 1.2 Supports both legacy and MSI interrupts Support ASPM power management Equipped with short iron pieces (optional), supports 2U chassis. serial port Dual UART or Quad UART Supports RS-232 full serial modem control bi-directional speeds up to 25Mbps per port Supports hardware and software flow control Supports 5, 6, 7, 8, 9 bit serial formats Support serial communication verification mode: even, odd, none, 0, 1 Supports on-chip 256-byte FIFO for transmit and receive on each serial port path Supports remote wake-up and power management functions Support serial port transceiver shutdown All serial ports support slow IrDA mode (up to 115200bps) Support 9-bit mode multi-point application Provide RS-232 serial port 5v or 12v DC power output through COM pin 1 or 9 Applications Serial Connected Devices Serial Network/Monitoring Devices Data Acquisition Systems POS Terminals and Industrial PCs Add-in Cards for Serial I/O/USB 1/0 Expansion for Embedded Systems System Requirements Windows XP/2003 Server/Vista/7/8.x/10 Linux Kernel 2.6.15 and later Android 1.x/2.x/3.x/4.x/5.