$79.34
StarTech.com Model ICUSB2322F 6 ft. 2 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention Male to Male
THROUGH USB - USB TO SERIAL - USB TO RS232 - USB TO DB9 - USB TO SERIAL ADAPTER
DUAL-PORT USB TO SERIAL RS232 ADAPTER - INTEGRATED 2500VRMS OPTICAL ISOLATION CI