?POWERFUL AIR COOLER & HUMIDIFICATION?Utilizing evaporative technology, our moblie air conditioner can effectively turns hot dry air into cool moist air and refreshing air at the same time. Keeps you cool and skin moisture, more comfortable and healthier than staying in air-conditioned room all day long. ?4-IN-1 FUNCTION?Combining functions of cooling fan, humidifier, air purifier, and 7 colors smoothing night light in one, this air conditioner fan helps you to create a personal comfort zone, save money for buying all devices separately, also keep your house away from the mess of being filled with those items. ?EASY TO USE?It only requires everyday cold water and no freon need. Simply add water into the tank(300ml, works up to 8 hours per fill)and press the middle button to power on. Left button for adjusting speed from low to medium and high, and the right button for setting smoothing light color. ?PORTABLE?Charge by USB 5V.You could use in office/home/outdoor/travel.Just simple plug to a USB port or power bank and there's no worry on the safe problem. ?COMPACT SIZE AND LOW POWER COMSUMPTION?Compared with traditional air conditioner fan, this one is mini size(6.5*6.5*6.7inch), only occupies small space. Besides, it takes power via USB with 10W consumption, which is safer and more energy-saving than using AC adapter.