Product name: intelligent heating clothes Size: M/L/XL/XXL XXXL/XXXXL Fabric: 100% polyester Lining: 100% polyester Operating temperature range: -5℃ to 40℃ Waterproof grade (IP) : 3 Temperature control mode: 3 gears of temperature control Heating temperature: 25℃-45℃ Color: black/dark blue Applicable scenario: outdoor sports/daily leisure Features: Lightweight heated vest: Lightweight insulation allows you to wear in a variety of ways in unrestricted motion; waterproof and windproof. Electric heated vest: powered by any 5V / 2.1A mobile power supply, USB plug compatible with most mobile power supplies on the market (battery needs to be purchased separately); 3 seconds fast heat, 0 radiation safe - fast and smooth heating without radiation. USB charging and heating vest: There are 2 heating zones on the back, from preheating to very high 3 heating levels. Suitable for outdoor activities such as snowmobiling, motorbikes, hiking, camping, hiking, skiing, fishing, hunting or office daily activities as well as business activities in autumn and winter. Heating vest size: suitable for every one (4 sizes of M~4XL), suitable for men, women, men, and girls. Suitable for all occasions: suitable for daily commuting, walking the dog in the brisk autumn air, wearing for your favorite football team, wearing a winter jacket, even wearing a cold office! Ideal for family members, friends, employees, enjoying cycling, hiking, camping, fishing and other outdoor activities in autumn and winter.