<p>Plug and play, 2*DP9Pin interface, automatically assign and I\/O addresses, and manually change the port number of the newly added serial port card.</p> <p>Comply with PCI-Express 1.0a standard, PCI-Express rate is 2.5Gb\/s. Full duplex channel, comply with PCI-E x1, PCI-E x4, PCI-E x8, PCI-E x16 and other PCI-E slots .</p> <p>Compatible with 16c550 UART standard and 256- transmit and receive , high-speed data transmission rate up to 250k\/sec, support -232 hardware flow control Data bit length: 5, 6, 7, 8</p> <p>Support MODEM modem signal , , Rl, DCD, DTR, , RS232 level conversion, support remote and power management functions.</p> <p>Dual-channel data transmission, strong compatibility. Support industrial computer, LED control, POS machine guest display, engraving machine, plotter copier, printer and other 9-pin serial port general equipment.</p> <p>Material:PCB board + metal</p> <p>colour:black</p> <p>Package Contents:</p> <p>1 x Expansion Card</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light 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.</p>