of needles is 4 in another embodiment a device or needle configuration may have a minimum of 9 needles with the polarity arrangement shown in fig6 or fig1 as noted above other needle arrangements can be configured according to various embodiments where the needles produce a desired energy field about the needle in order to generate a desired energy field 909 fig5 949 fig9 b about one or more needle 300 tips 302 an embodiment of the present invention may regulate voltage to be applied to a needle in addition to polarity pattern shape adjacent distance and frequency in an embodiment the voltage level applied to one or more needles 300 may determine or be a factor in setting the distance between needles 300 and ensuring safety of a device including the needles 300 in an embodiment the voltage applied to skin may be measured in an embodiment he meaning of u201c the applied voltage to skin u201d may be the actual voltage applied to skin between the surface of a needle and the skin the needle contacts the actual voltage value as applied to the skin may vary on device resistance needle resistance and skin resistance at different needle positions the voltage applied to a needle may be different to the voltage actually applied to the skin due to the skin resistance skin resistance values may vary sub dermally but negligibly it is noted that the applied voltage may be directly related to the amount of energy created at a needle in.