USB RechargeablePortable neck fan comes with a built-in 5200mAh rechargeable battery and USB charging cable included. 4 hours fully charged mini portable fan can last for 6-10 hours working (depending on which wind speed you choose). The small fan cancompatible with power bank, most computers, laptops, portable chargers and other devices with USB output.Neck-hanging and Double-Fans DesignUnique neck hanging structure, free hands, super comfortable experience. Double-fans design bringing you all-round coolness. It's very light and compact, even if you hang this small fan on your neck for a long time,you won't feel uncomfortable or tired.3 Adjustable Speed and 360 Rotate Low/Medium/High speed level.Adjust appropriate fan speed by pressing the power button.The two fan arms are flexible for 360-degree rotation, allowing the user to rotate and change the direction to get the most appropriatewind direction, instantly easing hot flashes.Aromatherapy designFragrant all day long. Turn on the aromatherapy tablet and drop in your favorite essential oil to accelerate the air circulation,it's an aromatherapy machine.Quiet designThe portable neck-hanging fan is made of high-quality copper brushless motor, effectively achieving stable speed and reducing noise,and doesn't bother your reading and working, allowing you to trulily relax and enjoy the cooling naturalwind.