Description Power Bank is not included9 Heating Pads USB Electric Heated Vest Jacket Warm Body Warmer Pad Winter ThermalSpecification BrandEnusicProduct nameHeating VestColorBlackMaterialNylon PolyesterSizeS M L XL 2XL 3XL 4XLHeating Pads9Power Supply InterfaceUSBPower Supply5V 2A Mobile Power Not Included Fever AreaBack Abdomen Waist Neck Size Unit cm The product is a slim fit model in Chinese size If you fat please choose bigger one size or two sizes sizeclothes lengthshoulder widthchest circumferenceHem S6339 15141M6540 35343L6741 65545XL6942 757472XL7143 959493XL7345 161514XL7546 363535XL7747 565556XL7948 36757Features 9 heating pads in each heated vest 3 levels adjustable temperature you can adjust temperature from 45° to 65° 90 Eiderdown in vest warm and comfortable high quality and durableGeneral USB interface power supply longer service life anti water splashing andwashable It can be washed by machine or by hand With mobile power bank storge pocket design easy to take when in travel 1 minutes fast heat dispel cold and keep you warm Warm comfortable and breathable and it s a good partner for your winter going out 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 lig