Venta LW45 Airwasher 2-in-1 Humidifier and Air Purifier in Black Humidifies dry room air while simultaneously purifying it by removing dust, pollen, pet dander, and other allergens For rooms up to 800 square feet No filter or replacement items needed to operate the unit - water is the filter No "white dust" common with other humidifiers Auto shut-off with water refill indicator light - 3 gallon capacity 10- Year Warranty Cold evaporation technology Output: 3/5/8 watts 3 gallon water reservoir 3 speed - push button operation Water level indicator light, auto shut off