I have been reading around the subject of zappers and have come up with quite a few possibilities. It seems many types of zappers are recommended by various biased people. I am keen to buy a zapper with variable frequencies like the one you recommend - gamma etc, but I want to read more evidence of testimonials. The largest database of testimonials I have read seem to come from the parazapper. Can I ask what zappers have you bought in the past and for what reason.