The Avalon Ultrasonic Humidifier with Filter, Aroma Diffuser, and 7 Color LED Nightlight is a stylish humidifier with 7 LED color light options to light up the tank. The humidifier is equipped with a ceramic filter to eliminate bacteria and mineral build-up in the machine. The back of the humidifier also has a built-in essential oil box to make the unit an aroma diffuser as well. The humidifier tank holds up to 2.8 liters of water and will last 10 hours. The unit has an easily adjustable knob to adjust the mist flow. This humidifier is ETL listed and meets all safety regulations.