Measuring 2.30 in * 2.50 in * 6.30 in and weighing merely 0.45 lbs, this portable handheld fan is compact and lightweight. Adopting advanced three-phase brushless motor, it greatly cuts down mechanical friction loss and reaches 80%-90% high energy conversion efficiency. Running at 15000 RPM high speed, it outputs strong 29.5 ft/s airflow equal to level 5 natural wind, bringing rapid and effective cooling effect. Built-in 5200mAh large capacity battery supports 3 to 17 hours long continuous working time under different wind speeds, meeting all-day cooling demands. It supports flexible wind speed control, one-click to switch 5 fixed wind modes including gentle breeze, natural wind, office wind, turbo cooling wind and storm wind, and long press to start stepless wind adjustment from 1% to 100% to fit various usage scenes. Designed with clear LCD smart digital display, it can real-time show wind speed and remaining battery level, letting you know power status clearly and avoid sudden power off. Featured with Type-C fast charging design, it can be fully charged within 2 hours, widely compatible with USB socket, laptop, car charger and other common charging devices for convenient charging anytime anywhere. Equipped with anti-loss wrist strap and ergonomic non-slip handheld design, it is easy to hold and carry, can be put into pockets and bags effortlessly. Ideal summer cooling necessity suitable for daily commuting, outdoor activities, travel, beach vacation, sports events, summer camp and daily indoor use, perfect cooling companion for adults and kids.