Men's Smart Heating Vest Jacket USB Heating Warm Winter Vest

Zipper closureComfortable and breathable, three-speed temperature control, bid farewell to bloatedness.The internal heating wire adopts carbon fiber, which has fast heating speed, fast heat conduction, high temperature resistance and corrosion resistance.This product needs to be connected to portable battery when heating, and automatically stop heating after unplugging.This product does not have a portable battery supply, you need to bring your own.How to use: Connect the USB plug to the power bank, press and hold the control switch on the chest for 3 seconds. The red light flashes to start heating. After that, press the temperature control switch to switch gears. Long press the temperature control switch for 12 seconds, turn off the light to stop heating.Cleaning instructions: machine washable, hand washable. Please do not wring by hand.Size Notes:* Size:S-----Bust:118cm/46.5"-----Shoulder:44.5cm/17.5"---Length:69cm/27.2"* Size:M-----Bust:122cm/48.0"-----Shoulder:46cm/18.1"----Length:71cm/28.0"* Size:L------Bust:128cm/50.4"-----Shoulder:48cm/18.9"----Length:72.5cm/28.5"* Size:XL-----Bust:134cm/52.8"-----Shoulder:50cm/19.7"----Length:74cm/29.1"* Size:XXL----Bust:140cm/55.1"-----Shoulder:52cm/20.5"----Length:75cm/29.5"* Size:3XL----Bust:146cm/57.5"-----Shoulder:54cm/21.3"----Length:76cm/29.9"