Two Operation Modes-This item has two operation modes, the first one is a mild mode recommended for children. After turning it on, press the button again to use the strong mode suitable for adults.Choose the mode you need! Automatic Switch-off & Cleaning Function-Our nebulizer will switch off automatically when the liquid has been almost entirely used up. It is also equipped with an easy-to-operate automatic cleaning function, just remove the accessories, remove the remains and add water, turn on the equipment to start the cleaning. Complete Accessories-A adult mask and a child mask are packed with the nebulizer for daily use of child and adult. We also prepared mouthpiece, user manual and USB cable for customers. Note-If the nebulizer can't work normally after a period time of use, please remove off the liquid cup and put it into boiling water at 100 degree celsius for 5 minutes. The dry the liquid cup and put it back to the machine. The medicine liquid may block the fog outlet after use so that the machine can't spray fog normally.