Feature:  1. This is a intelligence coat for you, built-in portable source storge pocket, easy travel.  2. Comfortable and breathable, and it's a good partner for your winter going out.  3. Face beauty and body shaping.  Activates various functions between skin and promotes metabolism.  4. Body warming and blood circulation.  Warms the human body, consumes excess heat, increases blood oxygen and fluidity.  5. Vitality restoration.  Provides deeper adjustment of physiological functions to avoid sub-health state and restore the vitality.  6. Pain relief.  Can improve the body's microcirculation, dredge and activate the meridians, eliminate local pain and inflammation.  7. Infrared heating with no harmful radiation and stable performance is safe and reliable, environmentally friendly, energy saving, soft and comfortable.     Specification:  Name: Graphene electric heating vest;  Fabric: 100% polyester fiber;  Lining: 100% polyester fiber;  Size: S, M, L, XL, 2XL;  Color: Black,Grey;  Power Supply Interface: USB;  Power Supply: 5V/2A Portable Source (Not Included);  Fever Area: 4 Heating Area - 1Back + 2Abdomen + 1Neck;  3 Temperature Adjustment (Manual adjustment): High: 50~55 degree Celsius (ed Light);  Medium: 40~45 degree Celsius (White Light);  Low: 30~35 degree Celsius (Blue Light).     How To Use:  1. Take out the US8 plug.  2. Connect to the power bank.  3. Press the power bank output switch.  4. Long press the temperature control switch for 3 seconds to turn it on, flashing for selection.  5. Blue light for low temperature heating, white light for medium temperature heating, red light for high temperature heating.  6. Long press the temperature control switch for 3 seconds, turn off the light to stop heating.     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. 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 those with pacemakers are disabled.  4. Please DO NOT disassemble, modify the heating film and control circuit, to prevent man-made damage to hot components.  5. The cable is waterproof, can be washed.