Add four RS232 Serial ports to any notebook or desktop computer using a single USB port USB to Serial USB to RS232 USB to DB9 USB to Serial Adapter USB to Serial port 4 Port Hub
StarTech. com ICUSB2324 USB to Serial Adapter Hub - 4 Port - Bus Powered - DB9 (9-pin) - USB Serial - FTDI USB to Serial Adapter
by NeweggConsumer Electronics
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$120.59
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