1.This is a intelligence coat for you. 2.Covering the cold area. 3.Built-in portable source storge pocket easy travel. 4.Set the temperature you want to respond to a variety of environts. 5.Heating area: 4 zones heating 6.The fashion is warm comfortable and breathable and its a good partner for your winter going out. 7.General USB interface power supply longer service life water splashing and washable. Specification: Product information Season:Autumn Winter Occasion:Daily Casual Material:Polyester Style:Casual Sleeve length:Long Sleeve Power Supply Interface: USB Power Supply: 5V/2A Portable Source(Not Included) Instructions for use Plug in the power bank and press and hold the power button for 3 seconds to warm up and then adjust to the medium temperature to heat up. You need to connect the power bank all the time. Washing instructions: Take out removable charger.Lock tightly during normal hand washing machine washing and thread take-up. Let dry during use. Package List: 1x Loose Coat(Portable Source Not Included) Notes: 1.If not used for a long time please do not plug in removable charger