I dont think every monster dealer has one. We had to purchase one if we wanted one. We call it our closure / bonus sale tool. When we do a demo for a customer weather they are buying a surge for HT or computer & they see what clean power dose they almost always purchase a unit with clean power. When we sell cables & go to a customers home to isntall ( we offer free installation) we as a service to the customer we always test the customers ac power with the customer watching of course. Over 90% of the time we end up selling the customer at least one power center with clean power. I always thaught my own ac power was great until we tested my ac & really found out how bad it was!