This Evaporative Cooler pulls warm air from the room through its water filter to fill any space with cool, clean comfortable air. Simply fill the water, plus it into any standard wall outlet or USB port and enjoy. It runs up to 8 hours per fill. This cooler 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. It is great for dens, reading nooks, dorm rooms, offices, home offices, and more. It is lightweight and even convenient for travel and great for outdoors too! It is not just sage to use but energy efficient and eco-friendly. This personal space air cooler actually cools the air around you, where you need it most while using the size and power consumption of a small fan.