this is from your main page which is incriminating:
"ParaZapper™ is an electronic device, Zapper, that can be easily shown to kill certain organisms in water and in other situations such as on or in the human body. For this reason, many individuals buy these devices, zappers, to safely kill or eliminate various parasitic organisms."
Killing parasitic organisms legally belongs only in the arena of the approved medical system. You are definitely open to legal attack by the FDA.