Quiet and powerful air volume: This fan uses advanced brushless motor technology and high-performance blades to quietly provide a strong breeze. Use the stepless control knob to seamlessly adjust the air volume to keep you cool without disturbing your tranquility. Long battery life: This fan is equipped with a powerful battery that can run continuously for up to 36 hours at low speed and up to 10 hours at high speed. It is perfect for long outdoor activities and comes with a USB data cable for convenient charging. Multi-function night light: With a bright LED light built in, this fan is an essential outdoor companion for nighttime activities. It can illuminate your surroundings and improve safety and convenience without additional equipment.