Qunqi 2L Water Drop LED Ultrasonic Aroma Diffuser Cool Mist air humidifier Aromatherapy Air Purifier 2.4Gallon per day (Waterdroop) 2L large water capacity.you can use it for a day You can adjust the quantity of the fog It have the night light function this is not only can purificate the air but also a beautiful decoration. 2.4Gallon Max fog per day Make your air fresh and with best humidity