Keep pressing right/left mini button more than 10sec, if LCD screen Displays n01 means AVG, n02 means RMS,loose the right /left mini button and keep pressing it more than 10sec, you may change AVG to RMS or RMS to AVG.
n01AVG n02RMS
Warning:
When APV works at AVG status, the product works much stronger than at RMS status. It will likely damage your atomizer. So we do suggest you to choose only RMS status.