MULTI-FUNCTIONAL 3 In 1 AIR COOLER: Mini air conditioning, air humidifier, air purifier three-in-one design.You can use it as a normal little fan, or you can by adding water and some ice as an air cooler.The built-in negative ion generator can effectively purify PM2.5, resulting in a healthy and fresh wind.The fog emitted increases the humidity of the air and keeps the skin hydrated. CORDLESS AIR CONDITIONER FAN: True wireless and portable design, small size, which won't take up a lot of space and can easily carry to anywhere. In summer, the best choice for camping and you can easily carry it out, very suitable for homes, offices, outdoor picnics, etc. (Rechargeable with Mobile devices for power supply) BIG CAPACITY: 300ML Large Water tank can be used for 4-5 hours, when fill it up. cold air can be sprayed continuously for several hours to keep the body cool at night for a good sleep. PORTABLE RECHARGEABLE DESIGN:Portable air conditioner fan with built-in 2000mAh rechargeable battery, which can work continuously for 3-5 hours when fully charged. The hand strap design makes it easy to take it with you anywhere. This evaporative cooler is only 6.8 inches high, small and light, it is an ideal small air conditioner for dorms, apartments, campers, offices, bedrooms, kitchen or living rooms. 3 LEVEL OF ADJUSTMENT SPEED : This mini air conditioner is designed with 3 modes of speed low, medium, and high, adjustable as your need. Also, you can adjust the wind direction by vertical rotation. (Note: portable air coolers are not suitable for cooling the entire room.)