#1	Simple operation powered by USBMicro USBSoldering pad adjust potentiometer to get the required voltage
#2	Adjustable voltage adopt multiturn precision adjustable potentiometer to adjust voltage
#3	One key design One key to turn off the output and digital tube short press to turn off the output long press to turn off the digital tube
#4	Data storage automatically save the state before the power failure the output data will not be lost