Microbe Electrifier/ DC combo: This is a Microbe Electrifier Plus with the extra option of either allowing an AC blood electrification frequency (4, 10, or 40Hz) or the selection of DC (direct current) output instead in order to have a good treatment method for localized infections (an infection in one part of the body). You should use the 3" square electrodes when using this feature. As an example DC works great on dental infections. People with root canals should treat them with DC to kill the residual bacteria left there which create the toxins which disable cancer immunity. [more info] It works good against things like gastritis, apendicitis, bladder infections, toenail fungus, and sore throats. This is my favorite device.