Both the Microbe Electrifer and DC Electrifier can do blood electrification and are therefore "blood electrifiers". But the Microbe Electrifier is preferred if the plan is to use it continually (more than 3 months) or if the person is taking some prescribed medicines. (The 40hz setting permits almost no transfection which eliminates the problem with drugs.) The DC Electrifier has the added ability to be able to deliver 1mA electrical current to treat hepatitis, or 3mA to zap cancer tumors. If you want to zap tumors and/or hepatitis AND you want to do blood electrification although taking prescribed drugs then you'll have to buy both units.