Feature:  1. 3 adjustable temperature levels, heating up to 6-10 hours.  2. The temperature can reach 25-45 degrees Celsius.  3. 3 heating areas, 2 heating areas on the abdomen and 1 heating area on the back.  4. Universal USB interface, use 5V/2A mobile power supply (not included).  5. Machine washable and water washable, good elasticity, not easy to wrinkle.     Specification:  Name: Smart Electric Heating Vest;  Material: nylon + polyester fiber (polyester) + fiber heating wire;  Color: Black;  Powered: Portable Battery (Not Included);  Size: See size chart;  3 Temperature Adjustment (Manual adjustment): High: 45 degree Celsius / 113 degree Fahrenheit;  Medium: 35 degree Celsius / 95 degree Fahrenheit;  Low: 25 degree Celsius / 77 degree Fahrenheit.     Note:  1. It is Not recommended to use high temperature for a long time to avoid burns.  2. Batteries, connecting plugs and chargers should aviod contact with water during operation. It should be used in completely dry condition.  3. NOT for Pregnants women, young children and those who can not express their willingness 4. those with pacemakers are disabled.  5. Please DO NOT disassemble, modify the heating film and control circuit, to prevent man-made damage to hot components.  6. The cable is waterproof, can be washed.  7. People who are sensitivity to heat applications(diabetics,circulatory problems)should not wear the battery heated cloth. Please consult your physician before using.  8. Always connect it to the energy bank when heating.  9. Energy bank is not included in the product.     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.     Notice:  1. Please allow 1-3mm error due to manual measurement.Pls make sure you do not mind before you bid.  2. The color may have different as the difference display, pls understand.  3. This product does not have the mobile power supply, please buy it by yourshelf.     Package Included:  1 X Heating Vest;  1 X USB Charging Cable.