This is a WORKMAN I's Frontier vest (XL) that was released and sold out this year, 2024. Battery included. I tried it on once, but I'm selling it as barely used because my job moved to an office position. Please understand if you are sensitive to this. The operating sound is very quiet, and the cooling starts within 10 seconds. Furthermore, if you put a jacket over it, the cold air will be trapped inside. Thank you.