This neck fan five adjustable winds speeds, ensuring a comfortable rapid cooling with our semiconductor cooling neck fan, featuring advanced technology that reduces body temperature by up to 20°c with powerful airflows Equipped with a 4000mah battery, this portable fan ensures long lasted use with features against overheating and overcurrent, making it a essential for any hot day Whether you ' re at homes, in the offices, or studying in a library, enjoy cooling comfort without disturbing others, thanks to its quiet operations Ideal for various ages and genders, this lightweight neck fan is perfect for anyone seekings relief from the heat