For the European market, ensure the products carry the CE mark and comply with the RoHS Directive to guarantee they are free from hazardous substances. For the US market, FCC certification is required for electronic components. Since these products are used in water, the housing material should be UV-resistant PE (Polyethylene) or ABS, which prevents yellowing, brittleness, and chemical leaching into pool or pond ecosystems. Look for UL or ETL listings if the product includes any plug-in charging backups.