Hand Free Design: Neckband fan is adopted with hand free design you can hang the fan around your neck and take it everywhere not will feel tired or uncomfortable when you hang the fan for a long time. 360° Rotate Fan: Hand free cooling fan is adopted with double heads design and two fans can 360° flexible rotate which allow you to adjust the best wind direction simple and easy to create powerful wind for yourself. Product Name: neck fan Size: 290 * 190mm Battery model: 18650-3.7v Battery capacity: 1200mAh Charging input: DC 5v-1a Charging time: 4H Working time: 4.5h-8h Weight: 168g