The USB Heated Vest has 8 built-in heating zones and 3 heating levels. The heating surface of the electric heated vest can dissipate heat well in all directions. With an intelligent temperature control system, you can heat the electric heated vest with the push of a button. Set 3 adjustable temperatures from 40 ℃ to 65 ℃. Helps keep the body warm, promotes blood circulation, relieves pain and muscle tension, increases the vitality of the body, ideal for cold winters. (No battery)The heated vest is warm and stylish so you can stay warm from anywhere. It allows you to keep your body warm in the cold winter.You can heat up the heated vest in 10 seconds with the push of a button. You can set the temperature range based on the environment: high (55-65 ° C), medium (45-55 ° C), and low (35-45 ° C).The heating cable of the heated winter jacket is low pressure design, generates uniform and gentle heat, makes the skin more comfortable.The Electric Heated Vest is suitable for 5V / 2A power bank, it can work 4-12 hours when using 10000mAh power bank: high modes: 3.5-4 hours, medium modes: 9-10 hours, low modes: 12 hours.The USB heating vest also has an inner pocket design, you can conveniently store mobile power or valuables.The elastic contraction design on both sides of the waist allows you to better adjust the comfort.