Compliance is the most critical factor for electrical components. For the European market, ensure products carry the CE mark and comply with RoHS (Restriction of Hazardous Substances). Specific regional standards include VDE (Germany), NF (France), and BS 1363 (UK - though usually 3-pin, 2-pin variants exist for shavers). For North America, UL or ETL listing is mandatory for market entry. Always request valid test reports from accredited third-party labs like TUV, SGS, or Intertek to verify insulation resistance and heat resistance.