The portable fan has built-in USB charging and can be used anywhere. Immediately after full charging, there is no need to connect to the battery. constantly charging. It can be charged via USB charger/laptop/mobile power/car power. Spiral that promotes better distribution of fresh air in the room Day and night: at minimum power. This fan distributes a powerful but absolutely silent jet of air. Our small air conditioner is environmentally friendly and energy efficient. You can use the USB cable to charge the battery. It is very convenient to take the mini air conditioner with you. It can be used à outdoors, even when the whole family is on a business trip. This portable fan is suitable for your home. the family, Suitable for cooking, traveling, outdoor activities, office, personal cooling, sports, etc. the race, the seat, at agrave; Reading and it's also a great personal desk fan. Specifications 1. Material: ABS 2. Duration: 5 hours 3. 5V-1A input 4. Battery capacity: 2000mAh 5.