Stay Warm & Toasty: Rechargeable heated vest has a heating system that consists of 5 carbon (graphite) fiber heating pads that generate consistent heat for 4 core body parts, including your neck, back, abdomen, and waist, helping to maintain body warmth, promote blood circulation, and relieve pain as well as 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 temperature of the weather and the feeling of the body. And the independent control design makes your device more power-efficient and more durable. Convenient Heating: Electric heated vest is compatible with any power bank with 5V 2A/2.1A USB output port. When it is connected to a 5V / 2A mobile power source (not included), hold down the power button for 3 seconds, and the graphite carbon fiber heating elements will generate heat across core body areas. 3 Temperature Control：This heated vest coat has three heating levels temperature. Three temperatures can be adjusted only by pressing a button on the heated jacket. High temperature: red color, Medium temperature: white color, Low temperature: blue color. Suitable for all Kinds of Scenes: The heated vest can help you easily live through a whole winter. Perfect for outdoor activities like snowmobile, motorcycle, mountain, camping, hiking, ski, Fishing, Hunting or office routine and business. Good for use during fall and winter.