Save your electricity bill while staying cool wherever you go! This Portable Air Cooler is a powerful, compact personal cooler that only use up a little energy but turns warm/hot air from the room into cool & comfortable air! The quiet motor makes it non-disturbing to turn on throughout the night! Simply fill the cooler with water, plug it into any outlet or USB port. It will be able to cool, humidify, and purify air for you!