It adopts MINI PCle bus design, which is suitable for platforms that require compact chassis space.All serial ports provide 15KV ESD protection to ensure the high-speed and stable transmission of the RS232 interface.Using MINI PCle bus interface design, suitable for platforms that require compact chassis space. The "smaller physical structure" design will greatly improve the space utilization rate.Applicable to all RS232 interface devices, including POS access control, automatic teller machines, embedded industrial automation equipment, financial payment ATM systems, transportation systems, factory automation and process control, systems, remote access servers, etc.System requirements Windows OS Linux 2.6.27, 2.6.31, 2.6.32, 3.x.x and above, computer with MINI PCI Express slotName: mini PCIe to RS232 2 portMaterial:PCBcolour:As shownPackage Contents:1 x Serial Port Card1 x PCle CableOnly 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.