Three-phase brushless motor and 5,000mAh battery deliver up to 9m/s wind speed and 15,000RPM rotation, three times faster than regular fans Provides three hours to 15 hours of cooling on a single charge, ensuring extended comfort Easily adjustable wind speeds from one to 100 allow you to customize airflow for any situation Turbine structure and powerful motor quickly compress and cool hot air to provide fast relief in hot weather Cylindrical-shaped fan features advanced oxidation technology that gives it a sleek, metal-like texture High-definition digital display shows wind speed and remaining battery power, helping you plan ahead for charging USB rechargeable with 18W fast charging, fully charged in 1.5 hours to two hours for up to 15 hours of cooling Includes a 3.28ft. USB A to USB C cable for charging through USB socket, laptop, power bank, or car charger