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6ft (1.8m) USB to DB25 Serial RS232 Adapter Cable | Adapters and Couplers | Audio Video
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USB to RS232 DB9 Serial Adapter Cable - Serial Cards & Adapters | StarTech.com
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USB : USB to RS232 Serial DB9 Male Cable Adapter FTDI Chipset 10 Feet RPC- USB-RS232-3M by www.valley-ent.com
USB to Serial Adapter - Works seamlessly with TunerStudio
USB RS-232 DB9 Male Serial Adapter Converter with Prolific Chip