An ETL certification means that this product has been tested to set safety standards. The certification comes from Intertek’s Electrical Testing Labs. Like UL, Intertek is an OSHA Nationally Recognized Testing Laboratory with the goal of creating safe working and living environments. They provide assurance, testing, inspection, and certification services. Intertek tests to various standards, including UL, ULC, ASME, ASTM, ANSI, CSA, NFPA, NOM, and NSF.