The scarf heats up in 3 seconds instantly. Lasts 2-5 hours with full charge depending on the powerbank you use. Cordless and lightweight design for you to wear it anytime and anywhere with one press. This heating scarf is made of super soft fabric which is using breathable and ultra-light material and protect your neck from low temperature, which is perfect for cold autumn and winter days. The warmest gift for your loved ones and those who love you this winter!