Product Features.The serial port can realize the power supply of pins 1 and 9 Support special baud rate Industrial temperature range: -40 to 85°C 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 and power management functions. Material:PCB Colour:Black PCI Express: Single- (X1) PCIExpress endpoint control with PHY integration; Compliant with PCI Express 2.0 ; Compliant with PCI Express Card Specifications; Compliant with PCI Power Management 1.2; Supports both legacy and interrupts; Support ASPM power management; Equipped with short iron pieces, supports 2U chassis. serial port; Dual UART or UART; Supports -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- for transmit and receive on each serial port path; Supports remote 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 -232 serial port 5v or 12v DC power output through COM pin 1 or 9; Support DMA burst transfer Operating temperature range: 0 to 70°C or -40 to 85°C; Support special baud rate; 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 2.6.15and later Android 1.x/2.x/3.x/4.x/5.x Package Contents: 1 x Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. RS232 Serial Card 4-Port Expansion Card Serial Card