The OKY3406 with Module is manufactured by OKYSTAR and is a converter USB-UART PL2303 USB A. It is a dual-chip USB to asynchronous serial data transfer interface, designed for conversions from USB to UART, and can convert to asynchronous serial protocol like RS232, TTL, etc. It is easy to use with one-time programming and configuration, and it has an integrated USB transceiver and support for low-speed (1.5Mbit/s) and full-speed (12Mbit/s) USB modes. This Module also features a low power consumption, along with a wide operating voltage range, low power consumption, and an improved EMI performance with an integrated ESD protection.