This intelligent heated vest is designed to be automatic. It can be charged at any time with a portable battery to provide constant warmth. When wearing it you don't need to put on extra layer or a bulky coat, it is light weight yet warm enough, the best solution to help you go through the cold winter. Features: Employ carbon fiber material to store and release heat, this heated vest can auto regulate heat, keeping you warm all the time while ensuring great convenience. The outer material is polyester fabric, which is dirt-resistant, wear-resistant and washable. With a waterproof USB port, it is washable and can be charged at any time and anywhere to provide constant warmth. It has three adjustable heating settings, low temperature 45degree Celsius, medium temperature 55degree Celsius and high temperature 65degree Celsius. Unisex design fits most people. Specifications: Material: PET + Carbon Fiber Color: Blue Style: Unisex Charging Port: USB Heating Setting: low(45degree Celsius), medium(55degree Celsius) and high(65degree Celsius) Power: 5W Item Weight: 433g / 15.27oz Package Weight: 433g / 15.27oz Package Size: 35 * 25 * 5cm / 13.77 * 9.84 * 1.96in Packing List: 1 * Heated Vest 1 * Power Battery (option)