Brushless Motor - Super Power: The combination of a three-phase brushless motor and a 3000mAh battery significantly improves the wind speed, power, and endurance. The maximum wind speed can reach 9m/s. The highest rotation speed of the handheld fan is three times that of a regular personal fan, reaching up to 13000 RPM. It can cool for 3.5-15 hours on a single charge Scroll switch - customizable wind speed: The wind speed of this small fan is adjustable. Portable fans can be customized from 1 to 100 speeds to meet your various wind power generation needs in any scenario Technical Design - Cold Air Delivery: Personal fans utilize a turbine structure and powerful motors to quickly compress and cool the intrapped hot air, converting it into cold air blown out. On a hot day, this can quickly calm you down. The body of this turbofan is made of ABS material and uses precise plastic spraying technology. Its sleek cylindrical design provides an excellent tactile feel Digital Display - Power Reminder: This portable fan for travel is equipped with a high-definition digital display screen, which can show the current wind speed and remaining battery power, so you no longer need to worry about the remaining power of the fan. When the battery of this mini fan is low, you can arrange for charging in advance, ensuring a cool companion on every trip Small size-portable and anti-loss: The size of this portable mini fan is only 6.14*2.38*2.28 inches 0.47lb, you can put it in your pocket or bag, so no matter where you go, this handheld fan can keep you cool, it is a cool companion for your travel and outdoor sports, and it is also a thoughtful gift for women/men Multiple Charging Ways - More Convenience: This USB rechargeable fan can be fully charged in just 2-3 h