Hi Arthur — Believe it or not, I just gave away my new zapper! Have a friend in Northern California with multi-decade debilitation from migrane headaches. So, now I need a new one. yes, again. God Bless you for your good work. My mother has been using the one I gave her for the holidays EVERY DAY. She has noticeably more energy and is sleeping more soundly than in years. Thank you, thank you. MP, 2012-01-11