The Startech 4-Port USB to RS-232 serial adapter hub can be effective in demanding industrial environments or easy desktop installations. It converts a single USB port into four RS232 serial ports, allowing easy access to integrate, monitor, and manage multiple serial devices. Included DIN rail clips offer versatile mounting solutions. The rugged metal build lasts long. | StarTech 4-Port USB to RS-232 Serial Adapter Hub (ICUSB2324I)