Features: Brand new and high quality Boost Your Connectivity: This M.2 to 4-port RS232 Serial Adapter Card enhances your device's connectivity by providing four additional serial ports. Durable Metal Construction: Made of high-quality metal, this adapter card is built to last and withstand frequent use. Ideal for Industrial Applications: Designed for industrial use, this adapter card is perfect for connecting legacy equipment such as barcode scanners, printers, and other serial devices. Versatile Use: With its compact design, this adapter card can be used in a variety of settings, from factories and warehouses to offices and homes. Effortless Installation: Installing this adapter card is a breeze, thanks to its plug-and-play design that requires no additional software or drivers. Specifications: Type: PCI-E Riser Product Name: M.2 to RS232 Card Interface: M.2, M-Key Port: 4xRS232 Chipset: AX99100 Sytem Support: Windows/VISTA/Linux Package Includes: 1 x M.2 to RS232 Card note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!