When you are walking,you definitely don't want to hold a fan,Unique hand free and headphone design, thus you can hang the fan around your neck. What’s more, thanks to its lightweight and mini design and handle which contacts the neck is made of soft and skin-friendly silicone material.you won’t feel uncomfortable or tied when you hang the fan for a long time. You can take it everywhere. It’s prefect for indoor and outdoor activities.Built-in rechargeable 2000mAh lithium battery, you can charge the fan via a USB cable. And the USB cable that comes with the fan compatible with any USB port, such as computer, laptops, power bank, and regular socket and so on. Owing to different speed, the working time is 3-10 hours(depending on the use of wind speed).This portable fan is ideal for personal cooling, office, outdoor activities, such as camping, trips, hiking, climbing and watching sports etc. For long-haired people, please tie the hair when wearing the fan to prevent it from being stirred into the fan.