Dual chip design scheme new 16C1508 chip and ASM1083 bridge chip transmission performance and stability Pciex1 to 8 serial port cards, 8 standard RS232 serial ports, DB9 pin interfaces, equipped with 1-point 8 braided cable, which is more convenient to connect Eight standard RS232 serial ports are extended through pciex1 slot, and each serial port can independently send and receive fifo256 bytes PCI Express 2.0 compliant PCIe slot for higher transmission speeds 0 specification and downward compatible with PCI - Express1 1 specification PCI Express X1 slot, the theoretical transmission rate can reach 25gbp5, and PCI Express x1, x4, X8 and x16 slots can be used. Name:Rs232 Expansion Card color:Green + black Material:PCB Package Contents: 1 x Expansion Card 1 x Serial Port Cable Only the above package content, other products are not included. 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.