Can be powered by USB port and the fan is compatible with most computers, laptops, portable chargers and other devices with USB output. Made of ABS material, durable,for us to use.Cute pattern design, can also be a great decor in your home room. Mute and low noise working mode, one gear wind speed, will not disturb your sleeping. Compact size and light weight, easy to carry when going out.Great for office, home, dorm, study, library, which is great for baby's sound sleep as well. Strong wind, let you enjoy a cooling experience in hot summer days.