Many fan ask question about Yocan UNI voltage, read this thread and happy vaping.

What is the pre-heat voltage setting?
The pre-heat voltage level is 1.8V.


How many volts is each Yocan Uni setting?
The Yocan Uni is a highly portable device. It has three voltage settings: 3.4V | 3.8V | 4.2V.

How to change Yocan UNI Voltage?
To change the Yocan UNI voltage settings click the power button 3 times, continue this to get to the designed voltage setting.