Two Buttons Control - The portable desk fan has two buttons, one speed control and one timing control.You can set the time to turn off the mini fan, or long press the speed button to turn off. 360 AdjustableFoldable Fan - The foldable portable fan has 360 adjustable angle. The adjustable function allows you to aim the cool air in any direction.And the folding function allows you to easily store it in your cabinet, car, and anywhere. 4 Speed Design - The portable fan offers 4 different wind speeds. With low/medium/high/super wind speed level , this variable speed design provides you more choices in different temperature environments. 3600mAh Rechargeable Fan - With powerful rechargeable battery,this desk fan can work about 240~600 Mins according to the speed to meet all your needs. And even in high speed the noise is less than 40db. The cooling fan is a quiet and good friend when working and sleeping. Ideal for your bedroom office,camping use. Safe & Durable - These fans built-in optimized intelligent chip, can provide charge and discharge protection, over temperature protection, etc.,to ensure the battery life, but also to prevent short circuit and other security issue. The size of the product is measured manually, and there will be a 2mm error due to factors such as different measurement tools and measurement methods.