【LONG-LASTING RELIEF】Ultrasonic cool mist technology safely moisturizes the air for 16hours of continuous operation (depending on mist control setting) so you can breathe easily and get more restful sleep 【800 ML WATER TANK】 Large tank and powerful steam output provides ideal coverage for large bedrooms offices and other rooms up to 500 square feet 【Colorful Breathing Light】The colorful lights switch automatically giving you a different humid atmosphere experience. 【Convenient water supply design】The large-caliber water filler can be filled with water after removing the cover and the water filling process can be completed easily