①. Evaporative Cooling Technology: The portable air cooler draws in hot air, quickly cools it down through water evaporation, providing humidified and cool air to your personal space, adjustable multi-directional air outlet design, after adding ice water, it will effectively cool the hot air around you. ②. 3-block wind speed adjustment: 4-in-1 multi-functional design, not only a cute air cooler, but also a mini fan, humidifier, LED decorative lights, colorful circulating atmosphere lights, easy to find at night, the cooling effect is good, which can help you sleep better. ③. Portable and quiet: This mini air conditioner fan is lightweight and does not take up space, easy to carry, suitable for home, office, outdoor picnics, camping, etc. It is quite quiet (≤40db), even if you are reading in the library, you do not need to worry about the sound disturbing you and the people around you. ④. Built-in 3600mAh lithium battery: The battery has a long service life, which is different from the traditional method of connecting the cooling fan to the power supply. When you fully charge this water-cooled fan with a USB cable, the 3600mAh water tank can provide power for a long time (24 hours).