Power Converter Module, LED DC-DC Digital Boost Step-Up Voltage Converter LM2577, 3V-34V to 4V-35V – DEPD0003

With voltmeter display, voltage meter error 0.1V, range 4~40V. Large volume 5×5 touch key switches to measure the input and output voltage, and there is an indicator that can show which end of voltage you are measuring. The voltmeter can be turned off, press the switch for more than 1 seconds and less than 4 seconds, then loosen your grip it can be shut down. When the voltmeter is off, just press the switch shortly and turn on the voltmeter. With the function of input and output voltage measurement error calibration . Press the switch for more than 4 seconds, after loosening your hands.