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USB TO TTL (C) Serial converter cable, adopts original FT232RNL chip, with stable high-speed communication, reliability, and better compatibility.; Built-in self-recovery fuse and ESD for over-current/over-voltage protection, counter-current proof, improving shock resistance.; Onboard IO protection, anti-surge design, with stable communication and safety.; Onboard TTL serial port 3.3V /5V level transilation circuit, for switching TTL communication level. Onboard 3x LED indicator, for checking power and signal transmitting status.; Plastic case, sandblasting process, nice-looking and compact.