The indoor portable evaporative air coolers evenly distributes cool air through the honeycomb cooling media while the dust filter cleanses the air. Its non-compressor system cools naturally efficiently and inexpensively without power-hungry components. This evaporative air cooler humidifier and fan is versatile lightweight and economical. It can also be used as a air purifier because of its anion generator. This air cooler easily rolls from room to room for use anywhere in your house or office. Feature Performs best in hot/dry climates where humidity levels are <50percent Utilizes a superb honeycomb cooling pad that ensures a high level of cooling Removable washable filter for clean air 3 wind speed settings (Low/Middle/High) for optimum comfort 2 ice-crystal boxes enhance cooling performance Easy to operate by turning the knob and buttons Swing automatically on left and right 4 caster wheels make it easy to move from room to room Specification Color :Black + White Net weight :10 lbs Air flow: 256 CFM Voltage :110V 60Hz Power :75W Water tank capacity :4L Fan speed :Low/Middle/High Overall dimension :10 (L) x 11 (W) x 24 (H) Package includes : 1 x air cooler 2 x ice crystal box