Evaporative cooling technology: Portable air cooler draws in hot air, cools it down quickly through water evaporative cooling, provides humidified and cold air for your personal space, adjustable multi-directional air outlet design, if you add some ice water, it will Efficiently cools the hot air around you.3-block wind speed adjustment: 4-in-1 multifunctional design, not only a cute air cooler, but also a mini fan, humidifier, LED decorative lights, circulating colorful atmosphere lights can easily find it at night, the cooling effect is remarkable , which can help you sleep better.Portable and Quiet: This mini air conditioner fan is designed to be lightweight and does not take up space, so it can be easily carried, suitable for home, office, outdoor picnic, camping, etc. It is very quiet (40db), even if you are reading in the library, you don't have to worry about the sound disturbing you and the people next to you.Energy saving and power saving Aandandand: Does not contain harmful refrigerants and does not use a compressor like traditional energy-consuming air conditioners, this small air cooler works for you with a rated power of 3W, which is very energy efficient compared to window air conditioners electricity while protecting the health of your family.Built-in 3600mAh lithium battery: The battery has a long battery life, which is different from the traditional cooling fan plug-in method. When you use the USB cable to fully charge this fan with water cooling, the 3600mAh water tank capacity can supply power for a whole day (24H).