It's a good zapper. I have the less expensive 15hz model with the copper paddles. If you don't want to hold them you can put one under each foot. Works for me. You can zap an hour or more. You might want to go easy the first time. With the lower hz setting like 15hz you can definitely feel a buzz. The 2500hz settings you don't feel as much, maybe a little tingle, 30khz hardly anything. I would use one setting for several sessions like 15hz, then go to the next setting for a few sessions. When you have a lot of die-off sometimes there are symptoms such as headache and flu like symptoms which fade as you get rid of the dead pathogens.
I will add that since having zappers I don't ever get sick like I used to. If you use the zapper at the first sign of a cold or feeling sick it works beautifully.
"Just wondering if anyone knows anything about this particular zapper. I have never had or used one. I did once have a tens unit. Are they similar? Can you strap the handles on to your body or do you have to hold them. I like the idea of the wrists straps, but want to know first if anyone else has used them. How does one put them on the abdomen, with tape? How long do you hold them or leave them on the body and how do you know if they are working. What do you feel? How do you know if there is die off? Thanks to anyone who can help me here...."