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EZSync USB to TTL(RS232) cable, FTDI Chip, 3.3V TTL, 1.8 meter, 3.5mm audio jack, TTL-232R-3V3-AJ, EZSync020 – Serial Connections Made Easy
USB to RS-232 DB9 Serial Adapter/Converter Multi-1/USB RS232 – Envistia Mall
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