A na-ekwe nkwa na ngwaahịa Diwei ga-agafe ule ihe ndị e kwuru n'elu na nnwale ngwaahịa emechara tupu ha ebuga ngwaahịa ndị ahụ nye ndị ọrụ gburugburu ụwa, si otú a na-enweta nkwanye ùgwù na ntụkwasị obi. Na mgbakwunye na nnwale onwe onye nke ụlọ ọrụ ahụ, anyị agafeela ọtụtụ asambodo sitere n'aka ụlọ ọrụ nnwale ikike, dịka CE, ISO, UL, FCC, TUV, EK, RoHs.