Features: 1.Independent power chip, 5v/12v power supply can be realized without external power supply2.PCI-E x 1 (compatible with 4x, 8x, 16x /graphic card interface)3.Can provide 2 standard DB9-pin RS232 serial ports, each port is full serial modem control, the bidirectional speed is up to 25Mbps, supports remote wake-up and power management functions4.Serial connected equipment; serial network/monitoring equipment; data acquisition system POS terminal and industrial PC; embedded system I/O expansion5.The driver is suitable for: WindowsXP/2003 Server /Vista/7/8/10 Linux Kernel 2.6.15 and later Android 1.x/2.x/3.x/4.x/5.xSpecification:Color: blackProduct name: PCI-E to 2-port nine-pin serial cardMaterial: PCB+metalInterface: serial portChip: AX99100Serial port: 2 x DB9-pin RS232 serial portPCI-E interface: support PCI-Ex1, x2, x4, x8, x16 slotsTwo-way rate: 25MbpsPackage Contents: 1 x PCI-E to serial cardOnly the above package content, other products are not included.Note: Light shooting 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.