This is a versatile evaporative air cooler, not only as an air cooler, but also as a heater, a humidifier, a fan, or an air purifier. Ideal for use in homes, offices, dormitories, etc.This air cooler and heater can provide you with a fresher and healthier environment by its particular air purifying function and removable washable filter. It will release a large mount of anions, which remove airborne pollutants. With 8 hour timing function and adjustable fan speeds, you can customize your cooling and heating modes as you need to get maximum comfort. In addition, this compact and lightweight air cooler is easy to carry and storage, caster wheels design make it easy to move the unit from room to room.Features:7L large-capacity water tank can avoid you from adding water frequently4 caster wheels make it easy to move the unit from room to roomIdeal for using in home, office, dormitory and so on