I live many thousands of miles from the rest of you unless there are any Strines here ! YOU will know who and where I mean ! Seriously..I am new to the the knoweldge and idea of zapping, and I,too, would ask the question...does it really work. Surely if it does one couldd see the evidence, if it is for worms too. We all want the best of health, but for those of us on very limited incomes ( and I, too, am one of those) we have to be really careful about where we put our money. So, I would like to know..how much is a good zapper and how heavy are they? What can anyone tell me about the synchrometer? I would like to hear from folk who are actively using one and about their efficacy. Cheers. Keep healthy, and put a smile on your faces.