specification:Style: heated vestMaterial: polyesterColour: BlackSize: L/M/S/XL/ XXL/XXXL/XXXXLPower interface: USBFunction: keep warm, splash water and prevent coldWashing instructions:1. Take out the removable charger.2. Use neutral detergent and wash by hand3. Do not rub or beat hard4. It can be used after natural air dryingInstructions:1. Pull out the USB plug.2. Insert the removable charger.3. Turn on the removable charger.4. Press the chest temperature control switch for two seconds.5. The red light flashes, indicating automatic heating.6. After the red light flashes for 5 minutes, it will automatically turn to white light, indicating that the temperature is medium.7. There are three levels of manual adjustment, and the red light means high temperature continuous heating. White light means continuous heating, blue light means continuous heating.8. Press the chest temperature control switch for two seconds to extinguish and stop heating.packing list:1 * Heating jacket (not including power bank)The dimensions are all handmade, please slightly deviate within 2 cm.The color is real, but due to many factors, such as the brightness or lighting of the computer screen, it may be slightly different from the image on the websiteIf you encounter any problems during the purchase process, you can contact us and we will provide you with a perfect solution.