Stay Warm: The rechargeable heated vest features a heating system consisting of 3 heating zones, which generate even heat for 9 core body parts, including the neck, back, abdomen, and waist, to maintain body heat, promote blood circulation, and relieve muscle pain and tension. Two heating areas are separately controlled by two buttons: Two buttons allow you to adjust the three-gear temperature to suit your needs. You can choose the heating area according to the weather temperature and your body's comfort. The independent control design makes your device more energy-efficient and durable. 3 Temperature Control: This heated vest has three heating levels. Three temperatures can be adjusted by simply pressing a button on the heated jacket. High temperature: red, medium temperature: white, and low temperature: blue. Convenient Heating: The electric heated vest is compatible with any power bank with a 5V 2A/2.1A USB output. When connected to a 5V/2A mobile power source (not included), press and hold the power button for 3 seconds. The graphite carbon fiber heating elements generate heat across core body areas. Suitable for all types of scenarios: With the heated vest, you can easily survive an entire winter. Perfect for outdoor activities such as snowmobiling, motorcycling, mountaineering, camping, hiking, skiing, fishing, hunting, or everyday office and business use. Good for use in autumn and winter.