Operation Guide for NR07 Series (NR07G and NR07S):
To power on the humidifier, turn the Controller clockwise until a click is heard signifying that the humidifier is on. To increase mist output, turn the Controller clockwise. It is recommended that the mist output be kept on low, due to the powerful output of the humidifier, unless the environment is extremely dry. Turn the Controller counter-clockwise until a click is heard signifying that the humidifier is off. When the water level dips to a point where the Main Unit cannot float, the small power indicator will blink. The Mist-maker and fan will automatically stop when this happens. Please refill water and restart the humidifier.
Below is a diagram highlighting how to operate the NRO7 Series (NR07G and NRO7S) humidifiers: