The portable USB fan is small and light, the wind transmission distance can be as long as 0.5-5 meters, making it the perfect partner to cool you down on hot days. Easy to take anytime, anywhere, it is the best ideal gift for your friends, family, children, baby, elderly, workers and others. Material: ABS Speed Settings: 3 Speed Modes Battery: Li-ion 18650- 3.7 V 2500 mA Charging time: about 3 hours Fan diameter: 8.5 cm Height: 17.8 cm Handle width: 3.5cm Weight: 165g Mini size, you can take it anywhere you go Enjoy your cool summer with Koopao portable fan Are you comfortable under the scorching sun and heat? Koopao portable fan is simple and smart, mini and works for a long time. The wind is strong but the noise is low. One-key control, there are three speeds to choose from: low, medium, high. Built with 5-way 2500mAh rechargeable battery, it is approx. 3 hours for a full charge, and 3 speed levels can be used when charging. The base of the mini fan can also be used as a mobile