The powerful, compact personal air cooler that pulls warm air from the room through its evaporative water filter to fill any space with cool, clean comfortable air! Cools, humidifies, and purifies for better air. Simply fill with water, plug it into any standard wall outlet or USB port and enjoy! It runs up to 8 hours per fill, is an evaporative air cooler that allows you to create your own personal climate. The whisper-quiet fan and soothing night light make it perfect to use throughout the night for a comfortable sleep!