UL is the abbreviation of Underwriter Laboratories Inc. (Underwriter Laboratories Inc.). The UL Safety Testing Institute is the most authoritative in the United States and the largest private organization engaged in safety testing and appraisal in the world. It is an independent, profit-making professional organization that conducts experiments for public safety. It uses scientific testing methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property and the degree of harm; to determine, compile and issue corresponding standards and help reduce and prevent life Data on property losses, while conducting fact-finding research business. UL certification is a non-mandatory certification in the United States, mainly for product safety performance testing and certification, and its certification scope does not include the EMC (electromagnetic compatibility) characteristics of the product.
