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 shapingActivates various functions between skin and promotes metabolism 4 Body warming and blood circulationWarms the human body consumes excess heat increases blood oxygen and fluidity 5 Vitality restorationProvides deeper adjustment of physiological functions to avoid sub health state and restore the vitality 6 Pain reliefCan 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 VestSize M L XL 2XL 3XL 4XL 5XL 6XL 7XL Optional Color Black Blue Red Grey Optional Material PolyesterPower Supply Interface USBPower Supply 5V 2A Portable Source Not Included Fever Area 7 heating zones3 Temperature Adjustment Manual adjustment High 45℃ 113℉ Medium 35 ℃ 95℉ Low 25 ℃ 77℉ 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 a