Package includes 1 x heated vest, 1x user guide, battery NOT included. 1 key control all 11 heating areas, heats up in secondsheated vest has 11 heating zones, it uses carbon fiber to heat up and starts to heat after powering on 3-5 seconds. heating zones are located on the left abdomen, right abdomen, left waist, right waist and back. It can promote the blood circulation of the body and relieve the fatigue of the neck and waist muscles. Heating vest is more effectively help to resist cold. 3 heating levels, there is always one suitable for youthere is 3 adjustable heating levels for warming heated vest for men and women: red light: 55-65 (131-149), white light: 45-55 (113-131), blue light: 35-45 (95-113) . The Power button is the switch of different temp status. You can set according to your demands. The interior of heated jacket is a comfortable and soft lining that can improved heating effect and maintains the temperature. Long-lasting Warmth, Battery NOT IncludedThe high-efficiency heating design of the electric usb unisex heated vest can quickly heat up in cold weather. As 10000mAh power bank for example, electric heated jacket provides warm time is red light 6-8 hours, white light 8-10 hours, blue light 10-12 hours. Red is suitable for outdoor sports or people who are afraid of cold and easy to catch a cold, white is suitable for outdoor walking workers, and blue is suitable for indoor workers. Powered by usb port power supply(battery NOT included: heating thermal vest is powered by common USB port power bank on the market. For convenience, you can choose large capacity power bank to maximize the working time of heating vest or prepare mutiple batteries in advance. Hand and Machine washableheated jacket is easy to care. Both hand wash and machine wash are acceptable. Please Note: the wash water temperature need under 30C or 86. Plug out the power bank before washing. We recommend you to wash it by hand to prolong the service life.