Features: Lightweight, easy to carry and store. Hand free fan was design as a headphone to free your hands anywhere. Hanging around your neck, suitable for traveling in hot weather, saved you from the embarrassment of dripping with a sudden sweat in public on numerous occasions. 2000mAh lithium battery fan built-in rechargeable was powered by USB, no additional batteries are required. The small personal fan is compatible with most computers, laptops, portable chargers and other devices with USB output. The portable fan have two wind head, can feel more powerful airflow, also can adjust the direction 360 which allows you to adjust to any different angles. Perfect for personal cooling, camping, outdoor event, trips, office, church, hot flashes.