The EH1770 Compact Air Cooler is fitted with a 3.5L water tank and has 3 functions (low/mid/high). The cooler operates by using water stored in the water tank. The water supplies a cooling pad that air is drawn through, cooling it before returning it to the room. This model is fitted with a swing function to distribute the cool air evenly. This portable unit can easily be moved around and is suitable for use in the home or commercial environments such as small offices, shops and workshops. The unit comes with 2 supplied ice packs.