The energy field of the 9 Volt rod is sufficient for checking laterality as well as for the localization of high energy losses and of fields of disturbance.
For diagnostic purposes the series of electrical rods has been enlarged by further models. Rods with 240 volts and the sophisticated version with 300 volts.
For experimental purposes, rods with 450 volts are available. The high voltage of the rods ensures a stronger polarization of acupuncture points and therefore a more detailed diagnosis. Electrical rods with a high voltage works by connecting 3 volts lithium cells. These batteries have a long durability.
All rods are protected by an internal resistance of 12.5 kOhm per volt in order to build a voltage but to keep the current flow in the area of micro amperes which is completely harmless.
Red pole = positive pole
Blue pole - negative pole