This is a fantastic attention grabber if you are working fairs or home shows promoting spray foam or blown in insulation options. Runs off electricity, balls for fiberglass batt will float and cellulose will spin showing why spray foam is worthy of the investment. New thermometers are needed. This retails new for $795 online. I have closed my business and no longer have a need for it. I have a video showing operation, please request and I can send to you.