The mini portable car humidifiers has more than 300ml water tank design can moisturize the air for up to 2-8 hours, quickly humidify and moisturize, let you put aside the fatigue of the day.(It is not recommended to use aromatherapy oils ) Colorful Atmosphere Lights: USB humidifiers with colorful night light. It will provide you with a variety of scene experiences while humidifying you at night, allowing you to have a more soothing sleep experience. Powered by USB: USB powered, convenient for carry around, compatible with any device with USB port such as laptop, desktop, power bank, socket, power socket. Multiple Modes: 2 kinds of adjustable spray, press once for constant spray, twice for spray interval. The Diffusers has aumomtic shutdown function, 2 hours line shutdown time for constant spray, 6 hours for spray interval. Low Noise: Humidifiers has less than 30 dB quiet operation and small and light, perfect for home bedroom, office in 20-30 square meters, or portable for car, travel.