The portable USB humidifier uses a one-button control, one button controls all functions. All you need 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 the colour light function. Mini humidifier. It has two spray modes and an automatic shut-off function. Fill it with water, in continuous mode, it can run for 4 hours, in intermittent mode, it can run after 6 hours. The humidifier automatically turns 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 take it with you. The USB power adapter is compatible with any USB port of the device and ensures it can be used in bedrooms, offices, cars and bathrooms. The mini humidifier is suitable for different environments such as bedroom, living room, children's room, office, spa, yoga room, etc. Less than 30 dB quiet atmosphere can create a quieter sleeping environment. Humidify your living space to prevent dry, stuffy air and flu/cold germs infecting your loved ones.the whisper quiet humidifiers purifier provide fresh and clean air,moisturize the dry skin, improve skin dry peeling.It can keeps your living space clean and properly moisturized.