Aierwill Air Humidifier Ultrasonic Aromatherapy Diffusers Mist Maker Fragrance Essential Oil Aroma Difusor Remote controlTIPS 1 maximum water quantity of the water tank is 350 milliliters and the injection quantity can not exceed the maximum water level indicator line. Otherwise, it is going to impression the atomization effect. 2 use the original adapter to enter power, in some other case it might impression the atomization impact or trigger damage to the host. three inject natural water into the atomizer to circumvent functionaldamage caused by impurities within the water sound emitted from the within of the water tank duringoperation is the sound of the atomizer workingwhich is a normal phenomenon. Aromatherapy UFO Raindrop aromatherapy machine