Jacket with integrated carbon fiber heating element in the back area. Powered by an external battery (not included), will give you a feeling of warmth and comfort in any weather. Heating is carried out thanks to a special high-tech film of carbon nanotubes located under the lining of the product. For maximum comfort, you can manually select one of the three operating modes or use an automatic one: after 5 minutes of operation at the maximum heating level, the heating pad will automatically switch to medium intensity mode. When using a 10000 mAh battery, the heating element will work from 6 to 12 hours, depending on the selected operating mode and ambient temperature. Zippered jacket, 2 external zippered pockets and 1 internal pocket 1 heating zone: there are 3 heating modes on the back: up to 45 backlight), up to 35 backlight), up to 25 backlight) The necessary power supply: 5V 2.1 Maximum power: 7.5 W; current: 1.5A; voltage: 5V We recommend using an external battery of at least 5000 mAh Before washing, close the attached silicone cap and put the cord in your pocket. Wash by hand or in a washing machine at a temperature of up to 30 without air conditioning. Do not use bleach or aggressive detergents. Do not turn on the heating if the jacket is wet. It is delivered in an individual package with activation of heating: 1. Connect the external battery to the cable in the outer pocket of the jacket. 2. Press and hold the heating button for 2-5 seconds until the color indicator lights up. 3. Press the button again to select the temperature mode. 4. To turn off the heating function, press and hold the button for 2-5 seconds.