this information can help but the tools are expensive and no mention of zapper. it says that it helps the tissue to heal and if this is more then harm making then the balance to healing is overcame but the bacteria or parasite killed, not seen. may be the frequency and intensity if known for the found health problem or bacteria can be used from the zapper, if the clinic tell it to you. me - lack of knowledge. I need for my self one to treat all my body, so an expensive pad, hmmmmmm my God what a hostile world.