About this item Portable Neck Air Conditioner Zymise neck fan has built-in semiconductor cooling chip and 4-layer aluminum cooling pad, which is a new technology of wearable neck fan. It can reach a maximum temperature of 33F - 44F below ambient. With the aluminum cooling pad, it can quickly cool down your body temperature and dissipate the surrounding heat waves. In summer, the situation of stuffy and uncomfortable neck has changed a lot. Unlike other neck fans. 1 Second Cooling & 3D AirflowThis portable neck fan is equipped with 2 cooling plates and 4 powerful vents, which work together for fast and efficient cooling. Designed to cool neck air, these plates provide you with a refreshing breeze to keep you cool and comfortable even on the hottest of days. With its innovative design, this neck fan is the perfect solution for anyone who wants to stay cool and comfortable on the go. 10000mAh/5000mAh Long-lasting BatteryThe personal fan is equipped with a rechargeable battery, which can be used continuously for up to 8 hours. This means you can use the neck fan all day without worrying about the battery dying. In addition, the neck fan comes with a USB cable, so you can easily charge it anytime, anywhere. Whether you're on the go or at home, neck fans are the perfect way to stay cool and comfortable