Winley electric has obtained multiple third-party testing and certification including UL, cUL, ISO, CE, TUV and EMC. We have established a scientific production management system in strict accordance with ISO 9001 requirements, and simultaneously built a transformer material traceability system and supplier evaluation mechanism to conduct refined quality control over all links of the entire production process. Besides routine testing equipment, the factory has also introduced professional type test equipment such as lightning impulse testers. All products undergo strict factory full inspection in compliance with standard specifications. The company further provides a 2-year free repair service. Backed by these multiple guarantees, Winley Electric has built an excellent reputation of "zero quality issues" for its transformer products over the past decade.