Note: this unit is not an air conditioner and does not have a compressor inside. The air temperature difference will not be as good as an air conditioner, but an evaporative air cooler saves more on electricity cost. This unit is best used in dry climates or open spaces. Leave window/door open to limit the rise of humidity and for better air ventilation in the room. Add as much ice as possible and set unit next to you for best effect. This evaporative air cooler, humidifier and fan is versatile, lightweight and economical. The cooler easily rolls from room to room for use anywhere in your house or office. This air cooler shoots a stream of air with oscillating louvers, to evenly distribute refreshing cool air. Features a 3-D cooling pad and remote control. The air cooler works by endothermic reaction (a reaction that consumes heat), so this evaporative air cooler sucks air through a wick saturated with water. As the air flows through the wick, some of the water evaporates into the air, consuming the heat that was in the air. An air stream is then blown out the front of the unit and is considerably cooler than the current room temperature! this is not an air conditioner and therefore uses much less energy. 3-Dimensional honeycomb cooling pad: an unique cooling pad for enhanced cooling performance. The cooling pad is made of cellulose paper, impregnated with unique ingredients for high performance and structural strength. Treated with special stiffening and wetting agents for maximum water absorption and retention; and with anti-rot chemical for prevention of algae and bacteria growth. Due to the two-dimensional, weaving structure of the cooling pad, there is longer contact between air and water. Unlike other units on the market, where air only passes through a flat, 2-dimensional cloth.