Evaporative cooling technology: Portable air cooler sucks in hot air, cools down quickly through water evaporative cooling, provides humidification and cold air for your personal space, adjustable multi-directional air outlet design, if you add some ice water, it will effectively cool your surroundings of hot air. 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, circulating colorful atmosphere lights Easy to find 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. 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 A+++: It does not contain harmful refrigerants and does not use the compressor of traditional energy-consuming air conditioners. The rated power of this small air cooler is 3W, which is more energy efficient than window air conditioners and protects the health of the family at the same time. Built-in 3600mAh lithium battery: long battery life, different from the traditional way of external cooling fan.