It is a device that is used to loosen up all the junk in your chest. I googled it, it makes sense, and since we are covered by VA I guess the doctor ordered it for us. Thee cost I read was $16,000. (They didnt give us a color choice however) The lady said they will send someone out to teach me how to use it. I am supposed to give him 2 20 minutes sessions a day with it.