Features 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. Specification Item Type: Electric Vest Material: Polyester fiber Operating Temperature Range: About -5℃ to 40℃ Lining: 100% Polyester Waterproof Grade (IP): Grade 3 Power Supply: 5V 2A mobile power(not included) Temperature Change: Manual adjustment Warm Gear: 45℃ (Red lighting) Comfortable Gear: 35℃ (White lighting) Energy Saving Gear: 25℃ (Blue lighting) Use: Fashion warm, comfortable, breathable, a great companion for winter outings. Package List 1 x Electric Heating Vest