I am aware that no one can replicate Royal Rifes work properly but these machines are based around his findings and John Cranes. Lets not go to technical because people will get lost.
Proper RIFE equipment is totally different to a zapper. There is no contact device around as powerful as a spark gap (plasma tube) as used in Rife and Lakhovsky units (Violet Ray). A zapper stuggles like crazy to enter the intestines and doesn't do a good job even at 15hz unless its worn all day for weeks. Dont get me wrong though because a zapper and especially the Terminator are needed. A zapper can kill many problems like a machine gun and the Rife is designed to pick off specific pathogens etc like a sniper rifle. Its quite a complex subject and you should look into this more via many web resources that are available. You should still buy a Terminator and RIFE machines are very expensive and need to be used properly. Start learning on Hulda Clark then expand to Royal Ramond Rife and Georg Lakhovsky. You cannot use a Rife machine outside like you can a Terminator hidden under your clothing.