Using noise reduction motor technology, the operating sound is as low as 30db, which does not disturb offices work and late night sleep left and right automatic shaking function, wide angles airs supply coverage is wider, bidding farewell to discomfort caused by direct blowing, and evenly distributing coolness Equipped with a 3600mAh battery, it has a long battery life and can last for 6-12 hours when fully charged, meeting all day cooling needs Supports multiple charging methods including computer, car, and socket, allowing for recharging any times, suitable for outdoor camping and indoor use 4 Speed wind speeds: wind speeds can be switched freely, with a clicks matching for comfortable wind sensation