Stay warm and comfortable during outdoor activities with this electric heated vest. The vest contains 15 carbon fiber heating elements across core body areas, with 3 heating levels and a temperature display. The large area carbon fiber wire heater is safe and insulated, and the vest is made of skin-friendly polyester material. It is suitable for various outdoor activities and daily wear during winter. Power supply by USB and needs an external mobile power source. Features 1. Comes with 15 Heating Zones and 3 Heating Levels: 15 carbon fiber heating elements generate heat across core body areas (waist, back and neck). 2. This upgraded three-control, 15-zone heating vest comes with a temperature display that allows you to switch your desired warmth mode with the simple push. 3. Our heated vest will start heating slowly in seconds when powered on. its widely compatible for outdoor skiing, winter fishing, mountain motorcycle, bicycle, camping, snow hiking, hunting, outdoor attendance, winter street, office daily, etc that meets all your needs. 4. Upgraded designed heating system ensures you enjoy comfortable warmth. Large area carbon fiber wire heater, safe and insulated. 5. Comfortable and skin-friendly, touching smoothly and warmth better. It can help you easily live through a whole winter without wearing bulky clothes under cold condition. Specification Material: Polyester Color: Black Size: M, L, XL, 2XL, 3XL, 4XL Weight: 450 g, 500 g, 550 g, 600 g, 650 g, 700 g Input: 5 V High mode:55 Power supply mode: USB power supply Package Include: 1 Heated Vest