To be honest I don't know, but I think so. I have had it on for about 4 years and you can't really turn it off unlessyou unplug it. And, although this device helped me a lot, my most recent test only showed @ 4 lbs. Difference with it dialed all the way up and down (note turbo was going bad, but I never saw a huge difference from the dial.). Overall it helped a lot though.