ɪn ɐdˈɪʃən, spˈɛʃəl ɪnstɹˈʌkʃən ɪz nˈɛsᵻsɚɹi ɪf ðə pɹəspˈɛktɪv jˈuːzɚɹ ɪz ʌnˈeɪbəl tə dɪstˈɪŋɡwɪʃ kˈʌlɚz jˈuːzd ɪnðə kˈʌlɚ kˈoʊd sˈɪstəm ðæt aɪdˈɛntᵻfˌaɪz pɹˈɑːpɚ pˈaʊɚ lˈɛvəlz.
In addition, special instruction is necessary if the prospective user is unable to distinguish colors used in the color code system that identifies proper power levels.