USB Powered, no external adaptor required. Product Contents: Adaptor cable, software and user guide. Convert From: USB. Convert To: RS-232 Serial. 1.8m Cable length.
StarTech 1ft (30cm) USB to Serial Adapter Cable, COM Retention, FTDI, USB-A to
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StarTech.com 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM