A great combination of fan, cooling, humidification, and anion Our 4-in-1 portable evaporative air cooler combines the natural cooling properties of water with a steady breeze to cool down the whole room, increase air humidity and purify the air. There are 4 ice boxes and a 12 l ultra-large double water tank which can provide cool and fresh air for hours. It features 3 adjustable air supply modes and wind speeds, meeting your multiple needs. And the smart sleeping mode provides a comfortable climate so that you can enjoy an all-night peaceful sleep with a 7.5-hour time setting. And the remote control can amplify your freedom and control your air cooler from 20 ft. even there is a panel control away.