When fully charged, the Yocan UNI can get around 200 hits but the number of the hit may change according to the voltage you have chosen, the resistance of the cartridge and the frequency of its use.
It has the adjustable width which goes from 6 millimeters all the way open to 12 millimeters.
The Yocan UNI Instruction Manual
It does come with an instruction manual which shows you how to use it and includes some tips & tricks and disclaimers.
How to use the Yocan UNI Box Mod
To turn on the device press power switch five times. Pressing it three times will get you to voltage settings and after it gets heat up, you can inhale from the mouthpiece
Source: https://knowtechie.com/how-to-use-the-y ... te-review/