Feature:  1. 5 areas are hot, warm and comfortable, fearless of cold.  2. Intelligent heating is suitable for all ages.  3. USB charging,Fast heating in 3 seconds,Long endurance.  4. The temperature can be adjusted in three gears, and it will heat up in three seconds.  5. Safety, no radiation, no electric shock.  6. Lightweight, warm and comfortable.  7. No need to disassemble, can be washed all over.  8.There are three length adjustable buckle designs on the shoulders.     Specification:  Product Name: Smart Electric Heated Vest;  Material: Polyester (polyester);  Color: Black;  Size: S/L;     Temperature adjustment:   High temperature (red light, 70degree Celsius);   Medium temperature (green light, 55degree Celsius);   Low temperature (blue light, 40degree Celsius).     Washing instructions:  1.Take out removable charger.  2.Neutral detergent is available and then hand 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 removable charger.  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 removable charge.     Note:  1.Please allow 0.5-1 inch difference due to manual measurement. (1inch=2.54cm)  2.The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.     Package Included:  1 X Electric Heated Vest (Power Bank is not included).