As we clearly state on our website, "The inventor of the Thundervolt Zapper will not destructively criticize or badmouth another man’s creations. However, he will point out the differences."
We never say we are extremely brilliant or smart; but we have dual waveforms and three frequencies against one. The combination crushes parasites. We also have frequency freeze.
Other zapper makers may be upset because they don't have a Body Tester. We do.
Regards, The Thundervolt zapper.