Features: Plug and play no switch, no jumper, easy setting with software Adopt high-speed I/O- controller ;One machine can be connected- to multiple serial ports Transmission rate up to 1 Mbytes/second This card supports for WIN7 8 8.1 10 11 (32-bit and 64-bit) Vista- XP; for Server2022/2019/2016 2012/2008/2003/NT4.0/ME/98/DOS-/Linux etc, allowing your device to run on the new systems Widely used for telephone billing device, LED controller, DM-flashing machine and other serial device control systems Specifications: Product name: Pci to RS232 Serial Port Card Number of interfaces: 2 RS232 DB9pin Serial ports Applicable slot:PCI Serial Port: RS-232 Main Chip: WCH Size:approx 122x120x45mm/4.8x4.72x1.77in Product weight: 150g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. Package includes: 1 X Expansion Card