A few years ago I bought a really simple Hulda Clark zapper off the internet (I believe it was a homeschooled teenager.....wonder if he frequents this site). It is not adjustable or anything, you just hold it in your hands and plug in the battery. Now I am looking into the Bob Beck protocol to cure my infected tooth and I wonder if this zapper will do the trick. I don't want to spend any more money. I have spent hundreds of dollars to save this little tooth but it will be worth it. I am awaiting my magnetic pulsar and wonder whether to start using the zapper.