Features: 1. Offers a soothing 7-color nightlight for maximum relaxation. 2. humidify the humidifier with continuous and intermittent exchange in free mode. 3. 300ml water tank design can moisturize the air for up to 4-6 hours. 4.Auto shut-off and safety. 5. One-button control and USB power supply. These ultrasonic cool mist humidifiers are equipped with a 300ml water tank and 2 working modes and can work for up to 4-6 hours. Provides soothing night light in 7 colors for maximum relaxation. The mini humidifier can give you sweet relief in the dry air. It is powered by USB cable, so you can use it anywhere and anytime. You can plug it into your laptop, your car, or a standard USB charging pad. Quiet operation of less than 30 dB for undisturbed use during sleep. Ideal for use in the bedroom and for your baby at night. One-button control and USB power supply for easy humidifier operation and USB connection for your convenience in the office, home, car, etc. The air is very dry in winter