【3-in-1 Air Cooler】Our 3 in 1 evaporative cooler can be used as a regular fan without water, or you can add ice cubes to make this fan serve as an air cooling fan that blows clod air on hot days. Moreover, it can also serve as a humidifier on dry days. 【3 Adjustable Wind Modes & Speeds】This swamp cooler features 3 customized modes- standard, natural and sleep & 3 wind speeds-low, medium and high. You can achieve better control of the room temperature and satisfy a variety of needs. 【4L Large Water Tank】 The water tank of the room cooler has a large 4L capacity to support a whole night working with no need of adding water. Besides, equipped with 4 universal casters and a built-in handle, you can move and carry the air cooler to any room conveniently. 【Wide Range Oscillation】 The bladeless air cooling fan can adjust inner blades up and down within 70 degrees and automatically adjusts outer blades left and right within 120 degrees. Every corner of the room will be cool. 【Quiet Operation for Better Sleep】This portable air cooler produces low noise during operation and won’t disturb your sleeping and working. At the same time, there is no dazzling light that creating a comfy cooling environment.