When smoking longer then 10s, it will be close by itself
When the voltage below 3.2v(1pc battery)/6.4v(2 pc battery), or short cut , the LCD display will show "LO-V" to you.
It can adjust by itself no matter which kind of atomizer you use.
It can protect itself when the battery is putting wrong.
Keeping press on the right button 3 seconds, the display will show you the resistance, and 3 seconds on the left button, it will show you the voltage, and 3 seconds on both of them, it will show you the power.
When the resistance is below 1.2 ohm, LCD display will show "LO-?" to you.