Neck Cooler, USB Power Type, Portable Air Conditioner Cooler Neck Cooling Fan for Outdoor Birthday Gift [Latest Model] The 2022 Upgraded Neck Cooling Cooler is now available for the first time The first three cooling plates, performance and functions are completely upgraded and improved. Cold aluminum absorbs heat, aluminum blocks dissipate heat, and physical cooling cools, so it is an element to enjoy the coolness of a hot day. [Design of the cooling plate, maximum -16°C] Adopts semiconductor refrigeration technology to form temperature difference and exchange heat energy. The three aluminum cooling plates instantly transmit the cold to the skin in 2 seconds, and the temperature drops to -16°C compared to the outside temperature. When you hang it around your neck, you can immediately feel the coolness. It is cold around the neck. [Adjustable neck size] The size and angle of the neck can be adjusted, and it is a width specification suitable for women to tall men. The minimum collar size is approximately 350mm and the maximum collar size is approximately 450mm. You can freely adjust the size you want. This product requires a power connection. Attention Please do not cover the wind holes on both sides of the device, which will affect the cooling function. [Wide range of uses] Summer festivals, outdoor, watching movies sports, walking, climbing, excursions, festivals, commuting, school, etc. Material: plastic + aluminum color: black Package content: 1 x neck refrigerator 1 x power cord Only the above package contents, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.