USB Powered: The evaporative cooler comes with a usb cable that compatible with computer, power bank, wall chargers and any other USB-enabled power supply. Just plug it into the power supply for the whole day or night working. Perfect for your bedroom, office, living room and kitchen. speed and easy to use: We've improved this portable Air conditioner to set up and use. The three-step operation cools the hot around you in seconds, making the wind cooler, wetter, and cleaner. Saving & High Efficiency: This small conditioner has lower consumption that is cost effective. The fan can be automatically set to from side to side, allowing it to blow in more directions. Use time: fan: about 12 hours; second gear about 6.5 hours; third gear about 3.5 hours. Powerful Cooler: Do you feel too dry when in a room with -conditioned on? Portable Air conditioner helps you! Enjoy a cool summer with this fan. This portable Air conditioner fan can make a thoughtful gift for friend or family who needs a comfortable and cool relaxing environment in the summer.