3 SpeedsThe 3-speed USB Fan makes it easy to choose the most comfortable speed. Press the button on the back of the small fan to switch from on, low, medium, high to off. Low-gentle wind as pleasant as a spring breeze (2m or s-1500rpm), which is good for indoor air circulation Cool medium wind as if you were in the forest early in the summer morning (2.9m or s-2070rpm) High-strong wind drives away summer heat(3.7m or s-2616rpm). 360 Rotation and StabilityThe head of this electric fan can be rotated 360 vertically to provide wind in any direction to cool off quickly. The 4 rubbers designed at the bottom of the mini personal fan help reduce vibration and increase friction, which keeps it more stable and prevents slippage when working even at high speeds. USB Powered The powerful fan is powered by 1.5m USB cable (not detachable) and can be plugged into any equipment with USB port, such as PC or laptop, power bank, laptop USB wall charger (not included), car charger and any other USB compatible power source. you can just plug it into the power supply for all day or all night. (Note: This Ventilator does not include the battery). Easy to CleanThe front cover of the fan chamber is removable. You can turn the front cover counterclockwise to wipe off the dust. Then line up the groove and turn it clockwise to reinstall it. Once tightened, it will not loosen easily to ensure safety when using. Also put a sponge with your favorite scent, so you can enjoy the pleasant scent while cooling down. Compact and ApplicationThis is an air circulating fan, measures 14 x 14 x 5cm(5.5 x 5.5 x 2) in total, lightweight and space-saving. Portable desk fans are perfect for the office, office, dorm, home, bedroom, library, camping, travel or anywhere you need to make your day cool. Noise less than 50dB(30-50dB) gives you a quiet enjoyment.