1、Three levels of temperature can be adjusted, and there are also 2 buttons to adjust the heating area according to needs. And the button light can be turned off. 2、USB interface, convenient in use and longer service time. 3、Quick and uniform heating. 4、Unplug the power to machine wash. 5、Internal carbon fiber heating wire, can be rubbed and kneaded for easier cleaning. 6、Made of fine quality material, comfortable to wear and wear-resistant in use. 7、Warm and constant temperature, safer and low voltage. Color: black Size: S, M, L, XL, 2XL, 3XL (optional) Cloth length: S: 710mm M: 730mm L: 750mm XL: 770mm 2XL: 790mm 3XL: 810mm ChestCircumference: S: 1200mm M: 1240mm L: 1280mm XL: 1320mm 2XL: 1360mm 3XL: 1400mm Shoulder width: S: 468mm M: 480mm L: 492mm XL: 504mm 2XL: 516mm 3XL: 528mm Hem: S: 1160mm M: 1200mm L: 1240mm XL: 1280mm 2XL: 1320mm 3XL: 1360mm Suggested height: S: 1.7-1.8m M: 1.75-1.85m L: 1.8-1.9m XL: 1.85-1.95m 2XL: 1.9-2.0m 3XL: 1.95-2.05m Suggested weight: S: 67.5-75kg M: 72.5-80kg L: 77.5-85kg XL: 82.5-90kg 2XL: 87.5-95kg 3XL: 92.5-100kg Package size: 550 * 300 * 30mm / 21.7 * 11.8 * 1.2in Package weight: 683g / 1.5lb 1 * Heating Vest