men's heating vt, smart et, usb electric heating, winter warm clothing, s-5xl large, 11, Black;white

note:
the product do not include external batteri.
he needs a 5 volt power supply. 2a 20000 ah or higher.
we are asian size, 2-3 siz smaller than european size.
choose the right size according to our size
prs and hold the button for 3 seconds at the same time, the two buttons turn on the work at the same time, and only one button turns on the area heating
featur:
1.1 minute rapid heating to drive out the cold and keep warm.
2. set the temperature you want to rpond to various environments