Description:Features:1. Adopted bamboo charcoal fiber heating material, which is heat-resistance, wear resistance and can warm up rapidly.2. Soft and warm inner fabric offers you great comfort.3. Three gears temperature control, red led for high gear, white led for middle gear, Blue led for low gear.4. You can use your own power bank to charge the vest. (NOTE: power bank is not included).The USB plug is compatible with most power bank in the market.5. This vest will start heating in seconds when powered on. its 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.Material: Polyester FibersColor: BlackPower Supply Interface: USBPower Supply: 5V/2A Portable SourceNot IncludedFever Area: Back + Front AbdomenFunction: Keep warm, Anti water splashing and Prevent coldAge Of Application: Adults UnisexTemperature ShiftManual adjustmentWarm:45 (Red Light)Comfort:35 (White Light)Energy Saving:25 (Blue Light)How To Use:1.Take out USB plug2.Plug in removable charger3.Switch on the removable charger4.Press the chest temperature control switch for two second5.Red light flashing,means heating automatic6.After red light flashes for 5 minutes,then automatic turn to white light,means medium temperature7.Manual adjustment has three level,red light means hign-temperature heating continuously.White light means medium heating continuously,blue light means low heating continuously8.Press the chest temperature control switch for two second,lights out and stop heatingWashing 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.If not used for a long time,please do not plug in removable charger2.Do not use high temperature water or strong acid detergent.3.Forbidden to use electricity for wet clothes,Please turn off the power and stop using if cloth is wet.4.Use time depending on the capacity of removable charge.Package Included:1 x Coat(Portable Source Not Included)