The power indicator light， with voltmeter and voltmeter can self correcting. Adopted more advanced microprocessor voltage， voltage meter error of plus or minus 0.1V， the range of 0 - 40V ( note: to make the voltmeter to work properly， please make sure that the input voltage is above 3.5V )
Light touch button can switch measurement input or output voltage， LED lights display which road is measured voltage value， which way can save and memory of the current display voltage. Long press button to close the voltmeter shows
The input voltage from 38V to 4.0V ( input voltage must be higher than the output voltage of 1.5V above ) . Adjustable output voltage range of 1.25 V - 36 V continuously adjustable. (the input voltage must be higher than the output voltage of 1.5 V )