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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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USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.co.jp: UGREEN RS232 USB 9 Pin Converter Serial Cable D-sub9 Pin Compatible with Windows Mac OS 3.3 ft (1 m) : Computers
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USB to RS232 Adapter with PL2303 Chipset, CableCreation 6.6 ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black - Walmart.com
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