The portable USB humidifier uses one-button operation, one button controls all functions. All you have to do is press the on/off button every 1 second to control the mist. Press and hold the power switch for 3 seconds to activate the night light and colored light function. Mini humidifier. It has two spray modes and an automatic shut-off function. Fill it with water, in continuous mode, it can work for 4 hours, in intermittent mode, it can work after 6 hours. The humidifier will automatically turn off when there is no water, so you can use it at night without worrying about damaging the humidifier. The humidifier has a USB power supply and the portable and compact design is very convenient for you to carry it with you. The USB power adapter is compatible with any USB port on the device and ensures that it can be used in bedrooms, offices, cars, and bathrooms. The mini humidifier is suitable for different environments such as bedrooms, living rooms, children's rooms, offices, spas, yoga rooms, etc. A quiet atmosphere below 30 dB can create a calmer sleeping environment. Humidify your living space to prevent dry, stuffy air and flu/cold germs from infecting your loved ones. The quiet humidifier purifier provides fresh, clean air, moisturizes dry skin, and improves dry skin flaking. It can keep your living space clean and properly hydrated.