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USB-RS232-WE-1800-BT_0.0 - Ftdi - Cable, USB A to RS232, Serial Convertor
C2G 1.5ft USB to Serial Cable - USB to DB9 Serial RS232 Cable - M/M - 26886 - USB Adapters - CDW.com
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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 Serial adapter for the FLEX-6000 series – FlexRadio
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Sabrent USB-A 2.0 Male to Serial DB-9 9-Pin Male RS232 CB-DB9P
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PRO Single Port USB to Serial Adapter with Activity LED 3ft.