1、Operating Temperature Range: The working temperature of this electric vest is about ‑5℃ to 40℃, manually adjusted. USB interface power supply, carbon fiber heating wire, infrared heat, no harmful radiation. 2、17 Area Heating: The electric vest has 17 area heating to take care of your back, neck, shoulders, waist and chest. Keeps you warm when you need it. 3、3 Gear Control: This electric heating vest has 3 gear control, respectively, warm gear, 45 ℃, red lighting. Comfortable gear, 35 ℃, white lighting. Energy saving gear, 25 ℃, blue lighting. 4、Wide Use: Electric heating vest fashion warm, comfortable and breathable, is a nice companion for winter out. Whether you work outdoors or indoors, this vest can give you a comfortable experience. 5、Polyester Material: Our electric vest has a waterproof level 3, which can support you to wash it with water, made of polyester fiber, and the lining is also made of polyester fiber.