UL certification is founded by the global testing and certification organization, standard development organization, U.S. UL Co., Ltd. Since its establishment in 1894, UL has published nearly 1800 safety, quality and sustainability standards, of which more than 70% have become national standards in the United States, and UL is also the development agency of Canadian national standards.

UL certification is mainly used in general terminal products that consumers can buy directly from the market, such as household appliances, computers, heaters, fuses, power boards, smoke detectors, fire extinguishers and other products. All products with UL listing mark indicate that the representative samples of the products meet the relevant UL safety standards. This series of logo includes the United States, Canada and the United States and Canada three kinds of logo.