Operated by USB. This USB fan is great for refreshment when you’re out such as camping, picnicking and so on. Ideal for cooling. You can add ice or ice water into the storage box to provide freezing air. Input some scents, then it also could make air more fresh. Mini steam fan, mini steam conditioning, theft USB port, 2-door type wind can blow independent help you adjust the wind direction with wider fan angle, fan larger space than the fan with 1 door wind, compact size, safety for the user. There are ice cold water tank or the bottom. Quiet running smoothly. Source uses 3 AA batteries, or USB cable to connect the phone to a computer or DC5V power supply consumes less power & outdoor use, convenience when traveling, picnic. You can add ice or ice storage box, creating cold air conditioning was not as dry skin, also can put the tray pomades help create a relaxing space, comfort in the room. It is perfect for car, students’ dormitory, office, travel and so on 90 degree vertical airflow.