Specification:  Product name: Heating Vest;  Color: Blue; Material: Nylon+Polyester;  Size: S/M/L/XL/2XL/3XL/4XL;  Heating Pads: 5;  Power Supply Interface: USB;  Power Supply: 5V/2A Mobile Power (Not Included);  Fever Area: Back + Waist + Neck.     Features:  5 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 durable.  General USB interface power supply, longer service life,anti water splashing and washable.  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 light means hign-temperature heating continuously. White light means medium heating continuously,blue light means low heating continuously.  8.Press the chest temperature control switch for two second,lights out and stop heating.     Washing 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 charger.  2.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.     Note:  The color of the item may vary slightly due to photography and different PC monitor.  The size might be slightly different due to manual measurement. Your kindly understanding would be appreciated.     Package Included:  1 x USB Heated Vest (Power Bank is not included).