Yeeco USB Power Supply Module Buck Boost Converter 5V Step Up Step Down Voltage Regulator to 33V 9V 12V 18V 24V USB Power Supply Module

Instructions 1. Button Left side “ON” button: Short Press – to turn on or turn off the output terminal, reduce the voltage or current value of one unit in the calibration mode. Long Press – long press for more than 3 seconds, release to close the digital tube, press any button to resume the digital tube display. Right side "SW" button: Short Press - switch display voltage and current. Long Press - enter or exit calibration mode. Enter the voltage display interface to calibrate the voltage, enter the current display interface to calibrate the current. 2. Potentiometer knob Clockwise rotation increases the output voltage and counterclockwise rotation reduces the output voltage. The conversion voltage range is from 1.2V to 24V.