3 adjustable heat settings: heated vest with 4 carbon fibre heating elements that generate heat over the collar, in the middle of the back and under two pockets for body heat. It has one buttons to control the temperature of the collar, the buttons control low, medium and high temperatures. Premium and safety materials: The men's heated vest made of polyester fibre and the inner heating parts are made of spandex, very soft and without radiation. Heated jacket is very easy to put on and is not prone to breakage. 5 V USB charging and long warming: Not include power bank. Powered by any 5 V / 2.1 A power bank, USB plug compatible with most power banks on the market (power bank must be purchased separately). Multifunctional heated vest: electric heated clothing promotes blood circulation, heats the human body, consumes excess heat, increases blood oxygen and fluid when heated. is a new type of outdoor clothing. Multi-use: this heated vest is perfect for outdoor activities such as camping, hiking, skiing, fishing, hunting, everyday office and business.