"U" is supposed to be a "V" for voltage. The "P" stands for power or wattage. The "A" is supposed to be an "R" and is the resistance (ohms) of your atomizer. The second "v" is the power in your battery. Full is 4.2v, low is 3.7-3.8v.
If you press the V button and hold it, that takes you to the voltage settings (after the puff counter) and allows you to adjust the voltage from 3.3 to 5.0 volts. When in voltage mode, the
device will automatically set the watts appropriate to achieve the amount of volts you set vs the resistance of your atomizer according to ohms law. Likewise, pressing the P button and holding it will take you into wattage mode, which allows you to adjust from 6.0-11.0 watts, and also automatically sets the voltage accordingly. Whether you adjust the wattage or the voltage, the end result is the temperature of your
vape. Higher volts/ watts equals warmer vapor, lower equals cooler vapor. How you set it is up to you. Play with it to find the "sweet spot" for you. And as always, if you have any questions, post them!
Sent from my iPhone using Tapatalk while hittin' that Hawk Sauce on the MVP!