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. The remote control allows you to easily change settings. And this air cooler easily rolls from room to room for use anywhere in your house or office.