... for 2 seconds, the digital display will show your battery voltage measurement.3. The battery voltage will be displayed for 2 seconds, then the ... setting will be saved and the display will show your battery voltage during your vaping. 6. When " dR" is chosen,leave the ... for 2.0-2.5ohm,5V-6V for 3.0ohm. variable voltage new ecig vmax adjust 3 volt to 6 volt ,huge ...