This heated vest has 15 carbon fiber heating elements generating heat across core body areas, with 3 levels of heating control. The upgraded design ensures comfort, safety and insulation, and the temperature display allows easy switching of warmth mode. Perfect for outdoor activities and daily use in cold weather, this skin-friendly and lightweight vest is compatible with USB power supply. 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