Stay Warm: The rechargeable heated vest has a heating system consisting of 4 carbon fiber (graphite) heating pads that generate constant heat for 4 core parts of the body, including the neck, back, abdomen and waist, which also helps maintain body heat and promotes blood, circulation and relieve pain and tension in muscles. Two heating areas are controlled by two buttons separately: two buttons can adjust the different temperatures of the third gear, you can choose the area where the clothes are heated according to the weather temperature and the feeling of the body. And the independent control design makes your device more efficient and more durable. Convenient Heating: The electric heated vest is compatible with any power bank with 5V 2A/2.1A USB output port. When connected to a 5V/2A mobile power source (batteries not included), press and hold the power button for 3 seconds and the graphite carbon fiber heating elements will generate heat to core areas of the body. 3 Temperature Control: This heated vest has three levels of heating temperature. Three temperatures can only be adjusted by pressing a button on the heated jacket. High temperature: Red color( About 45), Medium temperature: Blue color( About 35), Low temperature: White color( About 25). Suitable for all kinds of scenes: The heated vest can help you easily live through a whole winter. Perfect for outdoor activities such as snowmobiling, motorcycle, mountain, camping, hiking, skiing, fishing, hunting or office and business routine. Good to wear during fall and winter. Lasted at least 6 hours when it connect to the 1000mAh power bank(no included)Washable with hand or washing machine, Do not wring dry.Please check the size Chart Carefully before place the order. Package included: 1* Heated VestOther items no included