The ActionHeat 5V Battery Heated Cable Knit Wrap Scarf is a stylish option to keep your neck warm & comfortable when the weather turns cold. Enjoy hours of soothing warmth on the back of your neck with just a push of a button. Fit & Design: Built-in heating panel strategically placed on the neck 4 LED power indicators display power banks battery life Battery Voltage: 5-Volt Unisex - One Size Ultra-fine carbon fiber heating panels Technology: Touch-button control technology (3 settings) An advanced heat-trapping insulation layer Additional Details: Lining: 100% Polyester Outer shell: 53% Nylon, 32% Wool, 15% Acrylic