Designed in California. 1.1 GALLON/4.5L LARGE CAPACITY: The premium humidifier with 1.1 Gallon/4.5L large water tank can support up to 36 hours of continuous use in low mist settingWHISPER-QUIET: With advanced whisper quiet ultrasonic cool mist technology, our filterless vaporizer produces very low noise. It is so quiet that you even can hardly hear it is onADJUSTABLE MIST LEVEL: With 3 mist level and maximum mist output up to 250ml/hr, the Ultrasonic air diffusion is ideal for bedroom, office, babies and large room and can help you to fight with dry skin, wrinkles, insomnia and nose bleedsSTYLISH DESIGN: Only one touch control button makes it very easy to use while looking great with any home décorAROMATHERAPY: Add essential oils into the aroma box, the fan then circulates the oils into the mist giving you a clean, pure and fresh smelling aroma. Perfect for Yoga, gym, living rooms, nightstand, nursery. Note: DO NOT add essential oil into the water tank and base, or it will cause leakage and stop workingEASY TO REFILL AND CLEAN: A 3-inch-wide tank opening makes it very easy to refill with less risk of spills. You can also fit a soft brush or rag through the opening to wipe down the inside of the tank and prevent bacteria buildup. Note: DO NOT let water enter the air vent while cleaning the humidifierBUY WITH CONFIDENCE: Safety guaranteed as auto shutoff when it detects no water; 1-year buyer assurance (with a free option to extend it by 1 more year) and lifetime support from Levoit