Fan Light Sound USB Charging Fan Student Office Home 2000mAh Features: Battery and USB charging fan: The fan has a built-in battery power supply and USB charging fan, with a built-in 2000mAh battery. It has a long working and is a portable fan suitable for camping, travel, and other work. You can also plug it into a power source to work continuously. Super Silent Fan: Unique upgraded blade. The minimum noise of this desk fan is close to 36dB. This mini fan is quiet enough, but still strong enough to bring cool wind and provide you with a comfortable working environment. The choice for work and study. 5- adjustable wind speed and low voice: The speed of this desktop built-in battery fan can also be adjusted between 5 according to your needs. It is generous and quiet, ensuring a calm motion of gas that is sufficient to meet needs. Packaging content and customer service: You will receive a built-in battery fan and a USB cable. Brushless motor and 8-inch fan blades: Brushless motor has a lower sound airflow. The 8-inch fan blades will bring more wind to you, with a gentle feel and no headache even after blowing for a long. 4-15 hour battery life: The fan is equipped with a 2000mAh large battery inside, providing a battery life of over 4 hours. Product Description: Fan blade size: 10.49 inches Speed regulation: 5th gear Battery: 2000mA Motor type: Brushless motor Fan blade material: plastic Noise: below 37dB Power: 10W Voltage: 5V Range: 4-15 hours Size: 6.49 * 5.31 * 8.66in Including: fan * 1, charging cable * 1