Description:  Built-in pocket is designed to carry the power bank (not included).  The heat pad can be heated fast with in 1 minutes. Note: The heat pad turn on after long press the button for 2 seconds.  Set the temperature you want to respond to a variety of environments.  A button to heating, three stall temperature control, intelligent heating.  It can be washed by machine and can be washed by hand. Do not wring it by hand.  General USB interface power supply, longer service life,anti water splashing and washable.  The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out.     Specifications:  Size: M, L, XL;  Material: Carbon Fiber;  Color: Black;  Power Supply Interface: USB;  Power Supply: 5V/2A Power Bank (Not Included);  3 Gear Temperature Adjustable:  - High: 65 degree Celsius±5 degree Celsius (Red Light);  - Middle: 55 degree Celsius±5 degree Celsius (Blue Light);  - Low: 45 degree Celsius±5 degree Celsius (Green Light).     Washing Instructions:  1. Take out the power bank.  2. Neutral detergent is available and then wash.  3. Do not force knead or beat.  4. After nature air drying can be use.     Warm Tips:  1. If not used for a long time, please do not plug in the power bank.  2. Do not use high temperature water or strong acid detergent.  3. Forbidden to use electricity for wet clothes, please turn off the power and stop using if cloth is wet.  4. Use time depending on the capacity of power bank.     Package Included:  1 x Heated Vest.