lvyuan humidifiers for large room bedroom 9l diffusers for essential oils 2.38 gal ultrasonic cool mist humidifier with 3 speed touch control top fill vaporizer auto off lvyuan over 2.38 gallon larger capacity lasts for 36 hours working time at one top fill. 300ml/h high moisture output is designed to humidify the air for rooms up to 500 sq.ft. with 3 mist settings adjustable between low, medium and high mist output.