A:Answer The LG 2.2 Cu. Ft. Over-the-Range Microwave - Stainless Steel, Model # LMH2235ST is ETL listed. An ETL certification means that products have 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. Both UL and ETL certifications are acceptable proof of a product’s safety. Having these certifications means that you can rest easy knowing that what you’re installing in your home or business won’t cause safety issues...^IFV