This product is not UL Listed. It does not bear the UL logo or the UR mark (UL recognized). The FCC is a testing laboratory that works with SGS (National Recognized Testing Laboratory (NRTL)) but does not have SGS logo certification. NRTL evaluates the safety of a product. The device can be tested to UL standards, but UL and NRTL require the manufacture of the product to be audited. Upon verification, a UL, UR or SGS mark can be applied. Since this label does not exist, the product has been tested, but the manufacturer may have issued something different. The test confirms that the quality control process ensures the safe use of the product. No certificates were provided after looking at the YIHUA product website. The current list of NRTLs can be found on the OSHA website.