【Instant Cooling In Seconds】Advanced semiconductor technology is the secret to this wearable air conditioner. Built-in semiconductor refrigerating chip and aviation-grade aluminum cold plate, personal air cooler cool the back of your neck and refresh your entire body in seconds. The current generated by the cooling chip creates a temperature difference and achieves instant cooling, coldness is transmitted to the skin within 3 seconds, lower your body temperature by 18°F instantly!【3D Airflow & 4 Vents Design】Unlike other neck fans, our advantage is 80 vents up & down to achieve 3D surround airflow, providing you with an immersive experience of 720° cooling. The upward vents blow cool air towards your face, the downward vents cool your skins of neck, chest, shoulder and prevent long time wearing discomfort.Dual powerful turbo motors, up to 5500rpm high speed,offers strong airflow to blows away your body heat during hot summer days.A great choice as fathers day gifts【3 Speeds & Long Working Time】Portable neck air conditioner has 3 settings: light breeze, mild wind, and cool wind. Built-in 4000mAh large capacity battery offers up to 18 hours of cooling experience. Different modes have different working hours. Equipped with USB-C charging port which makes charging 2 times faster. USB rechargeable, conveniently charged by laptop, pc, adapter, powerbank. A thoughtful and practical gift for graduation season or back-to-school season!【Hands-free & Bladeless Design】Keeping your hands free while staying cool is an important design concept for this blast personal fan. You will enjoy personal cooling while working, cooking or jogging and improving efficiency. Bladeless design which can effectively prevent hair from getting involved.Flexible silicone material, ergonomic neckband fits the curve of human necks. Neck fans for women will change the way you cool down during those hot summer days forever【Versatile】Headphone design which looks so cool & stylish for men & women. Perfect for workout, yoga, gym, walking the dog or outdoor event like BBQ, camping, cycling, hiking, jogging, fishing, golf, traveling, driving, attending a sporting event or just simply relaxing at the beach. Lightweight and portable, which allows you stay cool anywhere anytime!