Coach jackets are ideal for colder days and wintry conditions. These jackets allow you to determine the level of warmth you want. By simply pressing the button integrated into your jacket, you activate the heating elements on the back and in the front jacket pockets. Then set the desired temperature using the corresponding app on your phone. The heating elements are controlled by an external battery with a USB plug (not included) in an inside pocket. The temperature of the heating elements can be controlled in two ways: via the button on the jacket and via the iWarm 3 app. If you activate the button, it lights up blue and the temperature is set to the coldest position. If you press the button again, it will turn orange and the temperature will be on the "medium" position. Press the button again for the hottest position. The button will turn red. Using the app, you can set the temperature even more precisely. If the button on the jacket is lit, the app can be connected to the jacket via...