3S Cool Down 18 °F: The Ku Peltier Radiator is the secret to this neck ac device. With the 0.9 x 0.9 inch Ceramic semi-conductor radiator built in, Coolify neck air conditioner only needs to cool the back of your neck to refresh your entire body in seconds. Heat energy is exchanged by a semiconductor cooling plate, and the coldness is transmitted to the skin within 3 second, lower your body temperature by 18°F in just 3 second! 3D Airflow and Double Vent Design: Coolify's 3D Airflow Design includes 36 air vents to provide an immersive cooling experience. The upward vents blow cool air towards your face while the downward vents prevent long-term wear discomfort by cooling the skin of your neck. With the patented Air Duct, 5000 rpm High Speed Motor, and 41 mm Super wearable air conditioner, Coolify neck fan maximizes the efficiency of the cooling process and has 3 settings: light breeze, mild wind, and cool wind. Stylish Design & Safety Bladeless: The blade-less and hands-free design avoid the awkward moments that rest of cooling solutions may brought. Keep your hands free so you can do more! Using Coolify bladeless neck fans is just like wearing a pair of headphones around your neck. With its unique bladeless design, attention to comfort, adjustable hinges design and remarkable beauty, Coolify portable neck fan will forever change the way you cool down during those hot summer days. Features: 3S Cool Down 18 °F 3D Airflow and Double Vent Design Stylish Design & Safety Bladeless 2H Charging Using Up to 8H Elegant Package & 180-Days Warranty Torras Coolify Bladeless Neck Air Conditioner