Easy to remove and fill 1 gallon tank cool mist feature with adjustable miost control ultrasonic technology for whisper quiet visible micro fine mist clean mist anti microbial technology helps prevent the growth of molds and mildews on the surface of the tank built in led nightlight runs up to 48 hours per filling elegant design oscillating head with fixed poistion or 120 oscillation auto shut off protection when the tank is empty mains powered guarantee 2 years