I have had a number of inquiries about the value of point finders, and 
Electroacupuncture (EAP).  Both of these systems cloud the issues and
for someone using the torch (because the torch is relatively safe), 
the other equipment is either worthless or potentially damaging.

All electrical direct current flows between two poles.

The Acupoint Finder, Pointer Plus or Point Locator.
In the Point Finder systems, the patient must hold the hand grounding pole
in order to create a complete electrical circuit.  The 
alternative is for  the operator to disconnect this, and use his body 
as the circuit by touching the grounding plate, as well as hold the 
bare skin of the patient with his other hand to connect the circuit.   
When dealing with animals, the hair, which does not effect the light, 
acts as an insulator.

As we all know an acupuncture point is not a discreet area, but a zone 
of increased electrical conductivity of varying shapes, about the size 
of your thumb print, and a group of points on a particular area of the 
skin have an equivalent function.  For example, major Spleen points 
(such as SP 6) will stop bleeding, due to the Chinese Conceptual 
Functions of the Spleen.  As KI 8 is 1 cun away from SP 6 it will also 
stop bleeding, yet this is not a Conceptual Function of the Kidney. 
Also Surrounding ST 36, there are 5 other non-channel points that have 
an equivalent function.  Therefore pin point accuracy is not important.

The average adult can detect a current as small as 1mA,  and while the 
Point finder claims to be set at 0.22 mA, one can easily feel it, and 
so I doubt the accuracy.

This information is taken directly from the point finder manual, “When 
using direct electrical current of any sort, it is contraindicated in 
patients with pacemakers, pregnant women, in areas near or around the 
heart, directly over through or near a recent scar, scar tissue or new 
skin, or over abrasions or cuts”.

EAP.
The body is electrically charged relatively positively at the spine 
and brain, and relatively negatively charged to the extremities, and 
by example the knee would be more positive than the foot.  When two 
acupuncture needles are inserted, and a small electrical current is 
attached, if the positive needle (attracts electrons, negative charges 
or tissue anions) is placed closer to the body than the negative 
needle, (which attracts cations, positive charges, acid) then, the 
results will not be as good as if the needles were placed correctly, 
with the negative needle nearer to the body and the positive needle at 
the area requiring attention.

If the needles are left in for “a stronger treatment” then the 
negative needle attracting positive charges, ends up producing an acid 
burn.