Features: Double Port PCIe Serial Card with Two RS232 COM Port enhances connection and broad compatibility. Equipped with PCIExpress x1 supporting 4X/8X/16X slots, delivers 2.5Gbps bandwidth for stable data transmission across multiple systems. Essential for IT professional and industrial users managing serial printers, PLCs, or diagnostic tools requiring reliable RS232 communication. Optimizes workstations/servers setting up in offices or factories needing multiple devices connection through 9pin serials port. Easy PCIE to double 9pin RS232 port adapter simplifies upgrades while maintaining industrial signal integrity. Specifications: Product name: PCIE Serial port to RS232 9Pin double serial port Adapter card Size: about 15x11x3cm/5.9x4.33x1.18in Color: Green Technical process: double-port design, easy installation of PCIExpress x1 port With single-channel (x1) bus bandwidth up to 2.5Gbps compatibles multiple operating systems Package Includes: 1PC PCIE to 9pin serials port RS232 double serials port Adapter note: Due to the problem of lighting effect there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.