• The default operating voltage of the Intelligent soldering iron is 20V. If the maximum output voltage of your adapter is less than 20V, the maximum output voltage will be obtained. If your adapter outputs up to 12v, get 12V.
• When the power adapter without PD fast charging protocol is used, the operating voltage of the intelligent soldering iron is the input voltage.It is noted that when the adapter is connected and the heating will restart after entering the home page.This indicates that the output power of the adapter is not sufficient for adapter, please replace another adapter.
• If output voltage of your adapter is 20V, but the ouput current is less than 3.25A(That is to say, the output power is less than the power required by the soldering iron),after entering the main interface and heating,the adapter may be powered off and restarted, which will cause the screen to restart!(Other operating voltages are the same)
• If it restarts after heating, it means that the output power of the current voltage of your adapter is not enough to work normally, Please select a lower working voltage according to the output power of the adapter.If your adapter output is 12V/2.5A, 15V/2A or 20/1.5A, the total output power is 30W,set the operating voltage to 12V.

DATA SHEET : https://www.circuitspecialists.com/content/768354/User%20Manual.pdf