Electrical Electrical, Mechanical or Electromechanical Products Any electrical, mechanical or electromechanical product as long as it bears the ETL mark indicates that this product has reached the minimum requirements of the generally recognized US and Canadian product safety standards. It is tested to meet relevant product safety standards. ETL also requires that its production site has been inspected, and the applicant agrees to carry out regular follow-up inspections of its factories thereafter to ensure that products always meet this requirement.