Effective & Strong AirflowThe advanced design supports high-speed operation of the blades to provide maximum airflow and keep you cool anytime, anywhere. It is 25% quieter and 50% more powerful than similar models; the maximum speed is up to 2400 RPM. Even at a distance of 2.5 meters, you can still feel the coolness.3 Adjustable Speed & Self-check function The single button with 3 adjustable speed fan is adequate for your various cooling demand, just press the back power button to change the speed, it will always keep you cool at the low speed, the middle or high speed is strong enough to cool you down quickly after heavy sweat. With Self-check functionit will rotate for 2 seconds to avoid burning out due to excessive current when the fan is plugged in powerSo it will be safer than similar products.Quiet OperationThe desk fan is powerful and quiet, you can barely hear it at the low speed, the working sound is lower than 50db at the high speed, which will not disturb you. In addition, In addition, the switch indicator will automatically turn off the light function after 30 seconds, saving power and keeping you better sleep at night without being affected. the usb table fan is suitable for study, reading, work, sleep, yoga, etc.USB Powered Powered by a 3.7ft USB cable, comes with the usb cable that compatible with all USB port, such as computer, power bank, wall chargers and any other USB-enabled power supply, you can simply plug it into the power supply for the whole day or night working. (Note: This fan has no battery)[Adjustable head, easy to clean] The fan head can be tilted and rotated up and down 40 to direct the airflow to the place you want. The detachable front cover is easy to remove to clean the fan blades. Small and light personal fan, very suitable for home, office, desktop use.