Powerful desk fan. The first new integrated copper brushless motor is stronger and has a longer lifespan than ordinary motors, allowing the blades to operate at high speed to produce a strong breeze. The front cover has a fluid mechanical design that can maximize airflow.USB powered. Comes with a USB cable compatible with all USB ports, such as computers, power banks, wall chargers, and any other USB power source. You can simply plug it in for all-day or all-night operation. (Note: This fan does not have a battery.)Adjustable Speed: The small portable fan with 3 adjustable speeds is suitable for your various cooling needs; simply press the power button to change the speed. It will always keep you cool at low speed, while the high speed is strong enough to cool you down quickly after heavy sweating. Quiet operation You can barely hear it at low speed, the working sound is less than 45 dB at high speed, which is imperceptible and will not disturb what you are doing, the mini fan is ideal for continuing to study, read, work, sleep, do yoga, etc. Sturdy base Four rubber-designed feet at the bottom of the pedestal help reduce vibration and increase friction, keeping the fan firmly in place to ensure the airflow is directed to the desired location and does not slip when working even at high speed.