90 SEC DRY AIR RELIEFThe humidifier's fully upgraded ultrasonic cool mist technology quickly increases humidity from 47% to 58% in 90 to 120 seconds and lasts for 36 hours at 40 room. Instantly relieves dry skin, stuffy nose, coughs, stress and anxiety. SLEEP TIGHTThe E19 plant humidifier uses unique silent technology that ensures noise below 23 dB and all lights off. After a long and tiring day, the E19 humidifier helps create a peaceful and calm atmosphere. NO MORE buzzing, hissing or crackling. Breathe better, sleep better! EASY REFILL AND EASY CLEANThe E19 humidifier with humanized top-filling design makes it easy to fill water from the top without spilling water. The integrated structure makes cleaning just as easy. GOODBYE to annoying bottom refills, incomplete cleaning and unhealthy haze! Cleaning requires just a damp cloth and once every two weeks.