The varistors produced by our factory have passed UL certification ！

UL is the abbreviation of Underwriter Laboratories Inc. UL Safety Testing Institute is the most authoritative in the United States and the largest non-governmental organization engaged in safety testing and appraisal in the world. It is an independent, not-for-profit, 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; determine, write, and issue corresponding standards and help reduce and prevent damage to life. Property damage information, while carrying out fact-finding business.