The Quiet ultrasonic humidifier works almost noiselessly with a frequency of 29 dB (sinks than the library) and guarantees particularly quiet operation. This humidifier will not disturb you when you are sleeping or working. It can effectively moisturize dry skin and help you reduce skin exfoliation. DAYS Portable Mini Humidity and USB Power Supply - Compact design - Easy to take with you. The USB power adapter is compatible with any USB port on the device, which can be used in bedroom, office, bathroom and yoga scenes. 2 operating modes - "Mist" button. Short press once the spray function is on. The indicator light above the function keys is green, and the spray mode is intermittent once every 30 seconds. The light indicator shows red, in continuous spray mode, it will automatically turn off after 3-4 hours. The indicator light goes out and the aroma diffuser stops the vaporizer. In on mode, long press for 3 seconds to turn off vape function. 7 color LED marquee-“Light” key function. A. Short press the light and it will change color automatically; for example, short press the button to manually select the light color C. Long press for more than 3 seconds to turn off the light. This cool fragrance diffuser has a colorful bike light that creates a tranquil atmosphere while providing a gentle mist. It offers you maximum relaxation. Night lights can improve your sleep quality. The aromatherapy humidifier can be used as a 2-in-1 humidifier and humidifier, cool mist humidifier with aromatherapy. You can add different essential oils according to your preferences to create a pleasant atmosphere. Clean without changing the filter, it is an ideal gift for parents, children, relatives and friends.