The portable USB humidifier adopts one-button control, and 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 colorful light functions. Mini humidifier. It has two spray modes and an auto shut off. Add water and run continuously for 4 hours, and run intermittently for 6 hours. The humidifier automatically shuts off when there is no water, so you can use it at night without worrying about damaging the humidifier. The humidifier comes with a USB data cable, and the portable and compact design is very convenient for you to carry it with you. The USB cable is compatible with any USB port on your device, ensuring it can be used in bedrooms, offices, cars, and bathrooms. USB adapter not included. 1. The 300ml water tank is designed to provide moisture to the air for up to 4-6 hours. 2. Quiet operation, the noise is less than 30 decibels. 3. USB power supply, easy to carry. 4. Automatic shutdown. Once the water runs out, it will automatically shut off to protect the device. 5. Offers up to 6 hours of run time. 6, Cost-effective compared with big version. 7. Equipped with cotton swabs to filter impurities in water. 8. Using the aromatherapy essential oil expansion function, you can add a few drops of your favorite essential oils to let the room emit a pleasant aroma.