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Amazon.com: TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length,
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Amazon.co.jp: USB Serial Converter, USB 2.0 Compliant Easy Connection Portable Metal USB to RS232 Adapter with Driver CD for Industrial Barcode Scanner : Computers
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Industrial Isolated Multi-Bus Converter, USB / RS232 / RS485 / TTL Communication | Multibus Converter
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