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Battery (DC) or wall (AC) input. Low/high-power setting (dial or switch). Teflon or plastic cover. Transformer. dielectric. Cu plate. Steel mesh. Ozone or nitrogen oxides. Deodorized surface.
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Battery (DC) or wall (AC) input Low/high-power setting (dial or switch) Teflon or plastic cover Transformer dielectric Cu plate Steel mesh Ozone or nitrogen oxides Deodorized surface