Safety Design- Adopted the advanced technology,Newly upgraded imitation aviation fan blades, strong wind gathering, airflow multiplier, stronger wind, faster cooling. The mini fan provides 3 optional wind speeds. The maximum speed of the fan up to 4200RPM. Soft silicone fan blade, the edge is smooth and not sharp, the touch will automatically stop, safe and healthy. Fast Charge & Long Battery Life- 1.5 hours lightning fast charging technology. No waiting for charging, only 1.5 hours to fully charge. Greatly improved charging speed. You also can use a wall charger, laptop, power bank to charge it. Adopted the advanced technology,Built-in 1500mAH battery, the time of using available for 4-5 hours, the power is only 3.5W, high efficiency and energy saving, long-lasting cool. Foldable & Portable- The foldable design makes it easy to carry and store. With the oval shape, this rechargeable fan can hide the fan blade, you can put it in your pocket or bag when not in use, it's the perfect summer companion to keep you cool while traveling, queuing, or exercising. Power Bank Function & Quiet Operation- This portable fan can be used as a power bank (1500mAh), supplying power for mobile phone, MP3, etc. This stroller fan uses a high-quality motor, With no frame design, make the noise low to 50db. The low noise motor is suitable for your quiet office or reading, and suitable for your baby to sleep comfortably. Easy to use by only one button, even children can use it under the care of adults. Handheld & Desk FanThis mini portable fan can be used as a hand-held fan when folded 180, suitable for use in outdoor activities such as: shopping, subway, travel, bars, theaters, restaurants, queuing, traveling, etc. And it can be used as a mini desk fan when folded 270, suitable for makeup, office, library and other scenes. Enjoy the coolness everywhere and everytime.