Many have asked, what does the green switch on the back of my Kaleido M2 coffee roaster do? We asked the manufacturer for a better explanation.
"The green switch is only available on our M2 model. Our original M2 was designed to be equipped with only one heating element. Some customers wanted more power, so we installed a second heating element. Customers can choose one or two heating elements using the switch."
The "Off" side is one element, and the "On" side is both elements.