StarTech.com ICUSB2321X is a USB-to-serial adapter cable for connecting legacy RS-232 devices to a computer. It adds one serial port through a USB connection, making it useful when the computer has no built-in serial port.
The cable connects through USB 2.0 Type-A and provides a 9-pin DB-9 serial connector. Its 30 cm length keeps the adapter close to the computer. COM-port retention preserves the assigned port value when the adapter is disconnected and reconnected, which can simplify returning to an established serial setup.
The manufacturer lists Windows compatibility and applications such as barcode scanners, receipt printers and other point-of-sale equipment.