Features: Wide Usage: The PCI-Express I/O card uses the latest PCI-Express interface as the expansion bus, the standard interface of which the most common PC desktop system in the market is widely used. Convenient for latest motherboards are no longer to come with any or enough number of legacy serial or parallel ports. Expand the system with the additional serial and parallel ports for connecting their external peripheral devices. This PCI-Express I/O card offers superior performance and unmatched data transfer rates, which is also an for ideal solution for the industrial automation applications. Bus broadband speed up to 6Gb/s Using immersion gold process, good conductivity, anti-oxidation, ensure good contact, improve transmission rate Specifications: Product name: Mini pci-E to RS232 Serial Port Card Number of interfaces: 2 RS232 Serial ports, 1 Parallel Port Applicable Slot: mini PCI-E Bus Bandwidth: about 6Gb/s Product Size: approx 5.1x3cm/2.0x1.18in Note: Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may look slightly different from the actual item. Package includes: 1PC x Mini PCIe Expansion Card