The voltage and current required to go that distance is not the same as it is just for the wrist. I have not seen any research for going farther into the body. Beck just did on the wrist. So he knew there was was a electric/magnetic field arounf the wrist area. Any bigger distance don't know if the fields form or make the fields complete? I am always looking for any research that would give an answer. I would put a set on each wrist to double the blood flow coverage. If anybody has seen any other reaearch I would love to read it.