Built in rechargeable battery, fast charging through USB interface, not need to frequently replace the battery This handheld fan integrates humidification function, which can provide you with a cool and humid wind in the hot weather. Its high-speed turbines technology ensures strong wind power and maintains comfort even during outdoor activities The fan is equipped with an ergonomic handle design, which is lightweight and enduring, and is not easily fatigued when held for a long time Equipped with multiple wind speeds adjusted functions, individuals can freely choose the appropriate wind speeds according to their needs Adopting advanced quiet motor design, this small fan has extremely low noises during operate and will not disturb your work or rest