UL, short for Underwrites Laboratories Inc., is one of the world's largest private institutions engaged in safety testing and certification. During the development of more than 100 years, it has formed a set of strict organization and management system, standard development and product certification procedures. It is an independent, non-profit professional institution for testing public safety. It uses scientific methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property; to determine and compile, issue the corresponding standards and help reduce and prevent the loss of life and property information. At the same time, it carries out research business, product safety certification and operation safety certification business, which ultimately aims to provide the market with a fairly safe level of goods.

After years of development, it has become the UL eyewitness laboratory. Tests are conducted in the Acer Laboratory, witnessed by UL engineers, and approved projects are tested to fully grasp the test schedule and real-time test data analysis. For customers who are eager to apply for UL certification, "time saving" and "R&D acceleration" can be saved.