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• The BTE17-06B USB 2.0 To TTL CH340E Module Is A USB To TTL Serial Converter With A Voltage Regulation Of 3.3V And 5V. The BTE17-06B USB 2.0 To TTL CH340E Is Useful For Creating The Interface, Through The URL Interface (TX-RX) Or Microcontrollers That Require This Type Of Communication.