This air cooler is a personal air cooler that allows you to create your own microclimate.This air cooler is a three-in-one device: it can cool, humidify and remove dust particles in the air, thereby making your body healthier.Installation does not require a lot of time or effort-just pour water into the water tan in the power source and enjoy. This smart new solution for the refrigeration market provides a device that actually uses the size and power consumption of a small fan to cool the air.People usually cannot reach a consensus on the temperature of the conventional communication wall, so it must be shared with the entire office. Now you can use personal cooling equipment.When you sit in one place, the conventional central air-conditioning system cools the entire building to no avail, wasting your money. It is based on natural water evaporation technology.This is the most effective evaporative air cooler of this type. No other device can provide such cooling performance in such a small size.Since this air cooler is an evaporative air cooler, it absorbs dry hot air and makes it cool and humid.The performance of any evaporative air cooler depends on temperature and relative humidity-to understand its performance under your conditions, please refer to the temperature drop chart image. It works best in dry climates, but we do not recommend that you use it when the humidity in the room is higher than 70%packing list1 air cooler1 USB3.Please allow 1-2cm error due to manual measurement.4.Actual color will be slight difference between the picture because of the brightness.