?3-in-1Multifunction? Mini evaporative air cooler, refrigeration, humidification and air purification all in One, keep away from dry air and reduce allergens, dust and smoke and enjoy fresh air and healthy life. ?Leakproof & New Filter Paper? The new release control such as water according to the speed of the wind, effectively avoiding water leakage problems. The new filter element adopts new material, has strong water storage capacity, and can be disassembled and washed to effectively avoid the mildew and deterioration of the filter element. ?Energy saving? Evaporative air cooler, Three wind speeds (high,medium,low) can be adjusted, When the water tank (460ml) is full, the unit can be used for 5-7 hours, reducing the air temperature by 3-10 ° C to give you more cool. No freon, energy saving and environmental protection. ?Portable Design?The mini air cooler can be powered by a built-in rechargeable battery or USB. It is also possible to power a mobile phone or other device that uses a 5V DC power supply via a USB power port on the air cooler. The small size(13*13*17 CM) and light weight (about 0.6kg), with integrated handleeasy, can be carried and used anytime, anywhere. ?What you Get? An energy saving (3.5W) mobile air cooler, 6 month warranty and always friendly customer service.