【Advanced Cooling Technology】 Unlike other portable air conditioners, our portable air conditioner uses ultrasonic misting technology to atomize the water molecules in the water tank into ultrafine particles, then blows cool and moist air through the fan. There are also two misting modes to choose from, increasing humidity and keeping away dry skin, stuffy nose, and cough caused by dry summer air. 【USB Rechargeable Quiet Air Cooler】The hand strap design makes it easy to carry. Built-in 1800mAh rechargeable battery, supports up to 8 hours of working time after fully charged, can be charged by any USB device. Bring mini portable air coolers to brave the hot weather. 【500ml Large Water Tank & Upgraded Filter】 The large 500ml leak-proof water tank on the top is easy to fill with water or clean and keeps the air conditioner running for 6-8 hours. Adding ice to the water tank will make the wind cooler. Adding essential oils to soothe fatigue can create a comfort zone filled with fragrance.