1.Super Long Endurance and Strong Airflow- Adopted the advanced technology, it lasts for 14 hours with 2 speed level, 21 hours with 1 speed after about 3 hours full charge. The maximum rotating speed of the fan is 3400 rpm which is enough for personal use to keep you cool. 2.Foldable Design and Mini Size- The folding design makes it easy to be carried and stored. Besides, with the oval shape(1.3*1.3*4.7 inch, weight: 4.4OZ), this rechargeable fan can hide the fan blade, small and easy to ide into your pocket and purse. 3.Power Bank Function and Quiet Operation- 5V/1A USB-C output port makes the mini fan as power bank(2000mAh) in emergency, supplying power for mobile phone, MP3, etc. With no frame design, makes the noise to 50db which cause no bothering during work. 4.Flashlight and Include Wrist String- Long press the power button to open the flashlight feature when fan is not spinning. The flashlight is quite bright and can be useful in dark areas or if electricity is out. And with lanyard included, you can hang it on hands or travel backpack. 5.USB Power Fan & Fast Charge- You can use a wall charger, laptop, power bank to charge it. And the handheld fan only need 2-3 hours to get fully charged.