I am not clear on the zapping. My understanding is that some parasites in deeper tissues may need plate zapping, or specific frequency generation to that parasite specifically to eradicate it, or kill it, in theory. I am not qualified to answer that question, or know the exact answer, but I have given my understanding of it.
As for a website, I found the Fscan2 manual online by searching Google. However, I don't know where the website is. I discovered it through some doctor's, and a biomedical engineer, who is their colleague.
The velcro peice with two metal rivets go over the right middle finger, and one holds an electrode or zapper handle in the left hand. You then hold still and relax, not saying anything during the length of the scan. It picks up resonance in the body, or frequencies, and scans through that range.
Zappers are great, but they don't kill everything in all cases. One needs to study more thoroughly the works of Dr. Jeffery Sutherland, Dr. Richard Loyd, and Dr. Hulda Clark and their websites, as well as the other sites out there on this research.
I will post more as I learn, and what I witness. I need more time, and more people to see some of this, but one can read a few interesting stories at http://www.royalrife.com