Description:  11 Heating zones.  Back, neck, shoulder, waist, both sides of the abdomen.When the power is turned on, the whole body can feel the warm.  It can be washed by hand or by machine.  The product can be immersed in water as a whole, and the power interface is insulated and waterproof.  The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out.  A button to heating, three stall temperature control, intelligent heating.  Fast heating, dispel cold and keep you warm.     Specifications:  Size (Optional): M / L / XL / 2XL / 3XL / 4XL / 5XL;  Material: Nylon;  Color: red/black;  Heated Area: 11 Heating zones;  Style: Sleeveless Vest;  Voltage: 5V;  Heating: 3 Gears - 25/35/45;  Power Supply: USB;  Power On: Long press for 3s.     How To Use:  1.Take out USB plug.  2.Plug in removable charger.  3.Switch on the removable charger.  4.Press the chest temperature control switch for 3 second.  5.Manual adjustment has three level, red light means hign-temperature heating continuously.  White light means medium heating continuously,blue light means low heating continuously.  6.Press the chest temperature control switch for 3 second, lights out and stop heating.     Considerations:  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 women who has baby, young children and those who can not express their willingness.  4. NOT for 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 vest. Please consult your physician before using.  8. Always connect it to the power bank when heating.  9. Power bank is not included in the product.     Washing Instructions:  1. It can be washed by hand or by machine.  2. Do not be exposed to the sun, firing or iron the vest to avoid damage the insulator of heating conductor.     Package Included:  1 X Heating Vest (Mobile Power Not Included).