Most heated jackets have multiple heat settings, such as low, medium, and high. This means you can control how warm you want to be depending on the outside temperature or your own body comfort. The heating elements are placed in key areas such as the chest, back, and sometimes the sleeves, because these areas help spread the heat effectively throughout your body. The user simply presses a button, usually located somewhere easy to reach, like on the sleeve or near the zipper, to turn the heating on or adjust the temperature. Some advanced models even offer smartphone apps that let you control the heat settings remotely.
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