Use the CAFL ( consolidated annotated frequency list ). It is available from electroherbalism.com
The informatrion about penetration is outdated for some advanced zappers using the 4 point contact system.
Note the following:
Warning: While Hulda Clark claimed that zappers could not reach internal organs, including the intestines, she did not use the advanced multi-frequency ParaZapper with the 4 point contact and 3 points positive. Since these frequency zappers are far more effective in inactivating microbes such as bacteria. protozoa, and fungi, and some individuals have chosen to use these ParaZappers for off-label personal use on their bodies, we have noted reports that doing so may destroy much of the natural, beneficial flora in the intestines. For that reason, it is very important to replace your microbiome with supplemental probiotics soon after using a zapper. Generally, consuming a good yogurt with live and active cultures of at least 5 or 6 strains of bacteria will be helpful in this respect. The company does not endorse any off-label use but believes ethical companies should let the public know about potential issues with off-label uses.