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USB to Null Modem Serial DCE Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
USB-COM232-PLUS1 - Ftdi - Adapter Board, FTDI Chip, USB to RS232
USB to Serial Adapter Cable w/ Isolation - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
FTDI USB RS232 db9 Plug Gold Plated Serial Adapter Cable Windows Driver Auto-Installing
CableCreation USB to Serial Adapter, USB to RS232 Converter, USB to DB9, RS232 Converter 9-Pin FTDI Chipset for Windows , Mac OS and Linux - Walmart.com
Amazon.com: StarTech.com USB to Serial Adapter - 1 port - USB Powered - FTDI USB UART Chip - DB9 (9-pin) - USB to RS232 Adapter (ICUSB2321F) : Electronics
USB 2.0 RS-232 Serial Adapter 16 Inches w/ LED Indicators
Two Way Radio FTDI USB to RS232 Serial Cable - Radiotronics USA