TRENDnet USB to Serial 9 Pin Converter Cable Connect a RS 232 Serial Device to a USB 2.0 Port Supports Windows and Mac USB 1.1 USB 2.0 USB 3.0 21 Inch Cable
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Sabrent USB 2.0 to Serial (9-Pin) DB-9 RS-232 Converter Cable, Prolific Chipset, Hexnuts, [Windows 10/8.1/8/7/VISTA/XP, Mac OS X 10.6 and Above] 2.5 Feet (CB-DB9P) - Walmart.com
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