It captures light from solar panels and generates a weak electrical current called "microcurrent." To replicate the professional technique of "kneading," it employs a 360-degree multi-angle structure. Specially shaped rollers with diamond-cut surfaces gently tighten the skin. This item has been stored at home, so I am unsure of the details. I am selling it because I have no opportunity to use it. Please refer to the photos and consider purchasing if you are interested. I am decluttering my home, so this is a short-term listing.