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USB Serial Adapter FTDI Chip RS232 DB-9 920K w/ TX/RX LED, Windows 10, 8, 7

Product Review (submitted on January 7, 2015):
I needed this to connect to a RS-232 connection on a Lennox L-Series RTU controller. My laptop doesn't have a 9-pin serial just USB and this worked flawlessly. No awkward driver installation. It was compatible with built in drivers in Windows 7 and I was off to the races in a matter of seconds.