Features: -With a smart LED Display to keep you informed of the neck fan's current working speed and remaining power. -The neck fan adopts a leafless safety design, and the turbines on both sides gather wind for safer, you don't have to worry about the fan curling your hair when using it. Its shell is mainly made of ABS and safety silicone material, it is Natural and Skin-friendly to wear, effectively non-slip.-Ergonomic design can be adjusted to any angle and fixed for use. No discomfort for prolonged wear.-With 4-stage adjustable wind speed, can be adjusted among low, medium, high and super wind according to your demands.-Built-in 5200mAh lithium battery, which can be quickly charged by USB.It can work for 8-20 hours after fully charging,.