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USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
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Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
USB to 1-Port RS-422, RS-485, RS-530 DB25 Serial Interface Adapter - Sealevel
5' USB to RS-232 DB9 Serial Adapter Cable – Serialio.com
USB-C to Serial RS232 Cable
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PRO Single Port USB to Serial Adapter with Activity LED 3ft.
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![USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/18-06.jpg "USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits")
USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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3ft USB to Serial Cable/RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
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3ft USB to Serial Cable/RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe
Gearmo USB 8 Port Serial RS232 featuring FTDI Chipset with LED Indicators
