Large capacity battery: Our portable neck fan has a built-in 1200 mAh large capacity battery that can be charged via USB. Full charging takes about 4.5 hours and can work continuously in low wind mode for about 14 hours and in strong wind mode for about 4 hours. It is compatible with all USB ports, such as for example a computer, a power bank, etc. so that you can charge it when you go out. Switchable air volume: Our battery-powered chain fan can easily switch the air volume with the push of a button. You can freely adjust the amount of air (weak wind, medium wind, strong wind) depending on thermal performance and preferences, reducing power consumption. In addition, the noise generated by the rotation of the clock fan, so you can use it comfortably and stress-free in a quiet environment such as an office. Easy to carry: This portable hip fan is very convenient for you to use. It is a multifunctional fan. You can use it as a neck, hip, hand or desk fan. Let you feel cool anytime, anywhere. Easy to use: Our portable neck fan is so easy to use that you can take it with you wherever you go, with long battery life and USB charging, so you can feel the cool breeze whenever you want. Suitable for many occasions: Our portable hip fan is not only suitable for high-temperature and non-air-conditioned workplaces such as construction sites, kitchens, agricultural premises, home deliveries, factories, warehouses, etc., but also for hiking, exercise, walking, yoga, travel and other occasions. It cools you down and lets you say goodbye to hot flashes.