I dont know about accuracy but I know frequencie wise I saw the best results from just the 30,000hz mini zapper. Not even colloidal sliver gel gave me as good results.
I don't know if my newer zapper gets the frequencie that is supposed to be best for killing fungus. But I used last night and I'm feeling best I ever have
I shouldnt say that the first zapper I got did nothing except hurt me so yeah accuracy is important. God know what that zapper is spewing out. Or if it is even a zapper frequency it's emitting.