The heating zone is at the back of the neck . Get Rid of Cord Shackles: Unlike corded heating pads, the cordless design heated scarf can be used anywhere without electricity. It works with external battery of 5000 mAh. For your safety: Regular heating pads are big and bulky, but our scarf style is easy to wrap around. It fits perfectly around the neck, allowing you to relax your muscles while you sleep. Overheat protection and 45-minute auto shut-off to protect your safety. 3 Heat Settings: Low (40-113) keeps warm for 6 hours, Medium (50-131) can provide 4.2 hours of heat. The high (60-140) can last for 2.5 hours of continuous heat. It's not hot enough to burn you, but it's hot enough to keep you comfortable. Targeted Heat Therapy: Graphene heating technology and far-infrared ray release promotes blood circulation to loosen and relax tight muscles. First turn on the power bank, plug the USB into the scarf, and then press the 3S button to turn on the scarf. One Fits All: The unisex design, both men and women can wear this scarf and easily fit your coat. As the weather gets colder, muscle aches and pains multiply. Give this to someone who is always cold and keep them warm in the cold winter.