Description:  1. Activates various functions of the skin to promote metabolism.  2. Helps warm the body, consumes excess heat, and increases blood oxygen and fluidity.  3. Provides a deeper level of physiological function regulation, avoiding sub-health status and rejuvenating.  4. It can improve the body's microcirculation, dredge and activate the meridians, eliminate local pain and pain.     Specification:  Color: Black;  Gender: Unisex;  Material: Polyester, Carbon Fiber;  Size: M, L, XL, XXL,XXXL.     3 Temperature level:  Low: About 45 degree Celsius;  Mid: About 55 degree Celsius;  High: About 65 degree Celsius.     Features:  5 Heating Zones & 3 Heating Levels: 5 carbon fiber heating elements generate heat across core body areas (chest,waist,back and neck).Adjust 3 heating setting(High,Medium,Low)with just a simple press of the button.  USB Powered: No specific battery required. You can use your own power bank to charge the vest.  (NOTE: Battery is not include).The USB plug is compatible with most power bank in the market.  Heated Quickly & for All Occasions: Our heated vest will start heating slowly in seconds when powered on.  it's widely compatible for outdoor skiing, winter fishing, mountain motorcycle, bicycle, camping, snow hiking, hunting, outdoor attendance, winter street, office daily, etc that meets all your needs.     Instructions for use:  (1) Vest features built-in USB port to connect the power bank(Not Inlcuded).  (2) Power switch - long press the switch for 3 to 5 seconds.  (3) Red light flashes - automatic heating.  (4) Red light - manual heating, high temperature.  (5) White light - medium temperature.  (6) Blue light - low temperature.     Cleaning Instructions:  (1) Can be washed by hand, machine washable.  (2) Remove the mobile power supply, add neutral detergent and wash it by hand. Do not force it or beat it. Allow the washed clothes to be naturally ventilated and dried before use.  (3) The highest washing water temperature is 30 degrees Celsius.  (4) Do not bleach, do not turn over and dry, do not iron, do not dry clean, do not chlorine bleach, hand wash, machine wash (cover USB waterproof cover can be washed), gently rub, rinse.  (5) Hang dry and do not wring out by hand.     Package Included:  1 x Heating Vest (Power Bank Not Included).