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: Electric Heated Vest;  Size: M, L, XL, 2XL, 3XL, 4XL, 5XL, 6XL, 7XL (Optional);  Color: Black, Blue, Red,Grey (Optional);  Material: Polyester;  Power Supply Interface: USB;  Power Supply: 5V/2A Portable Source (Not Included);  Fever Area: 7 heating zones;  3 Temperature Adjustment (Manual adjustment): High: 45degree Celsius/113degree Fahrenheit;  Medium: 35degree Celsius/95degree Fahrenheit; Low: 25degree Celsius/77degree Fahrenheit; Lasting time: 8 hours (Take 10000mah power bank as an example)  (Depending on the setting And battery capacity).     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 two second.  5.Red light flashing,means heating automatic.  6.After red light flashes for 5 minutes,then automatic turn to white light,means medium temperature.  7.Manual adjustment has three level,red light means hign-temperature heating continuously.  White light means medium heating continuously,blue light means low heating continuously.