The easy way to cool any space, Evaporative Air Cooler is a personal, eco-friendly design that pulls warm air from,the room through its evaporative water filter to humidify while cooling. Compact, yet delivers 2x more cooling power.Personal space cooler lets you enjoy cool, clean at home or away Lightweight and portable for Indoor/outdoor use. Works via any USB power supply. It can be run by using a laptop, a power bank or a wall outlet. You just need to fill the tank with water, then plug it into a power source and enjoy refreshing, cooling air! Easy Operation & night light. Precisely adjustable fan speed allows you to control the sound level as you wish.Features: Built-in water tank lasts up to 8 hours. Freon free, energy efficient & eco-friendly.