Excellent Condition Quack Medical Device.  Model K, # 78113, 110 volt, 30 watts. I say supposedly because some folks swore by these with certain ailments.  Anyway this one is in excellent clean working condition  even the case is nice shows some wear. It is working as shown picture and I was the guinea pig and tried it out.  Shot out sparks like it was designed to adjust intensity up or down, start low! No papers. Sold for approx. $25 new Some people swore by these units and If someone was going to spend that much in that time period they sure must have believed in it.  The pictures are part of the description.