Today, when I stopped by a supermarket in the city, I drew a lottery and won this set. (I received a 3-piece set, so I wondered what it was... and after looking it up, I learned that these kinds of goods exist.) Living in the mountains, I wouldn't have known about these kinds of goods... If anyone needs this and would like it, I will give it away. Will-O-ff New and unopened. It's a set of three: the main unit, the chlorine dioxide disinfectant to put inside, and a strap. Winter colds, the flu, and COVID-19... they're becoming prevalent. Please take care of yourselves!!