The Magzapper is a focused healing tool that can be used for cancer, however you cant put any frequencies in par from the given 5 on the dial on the machine. You use the machine in a circular manner around the problem/disease area for pain relief and disease treatment. It works completely differently to zappers and uses powerful magnets for healing. (magnetic healing) The description of MAG-ZAPPER is misleading in a way because it strictly isn’t a zapper. It is not a leave on and sit back device, it requires the user or practitioner to move the instrument over the body.