Patented Auto-Monitor Every 5 Seconds ??Patented Auto-Monitor Every 5 Seconds? This is the newer model of our original GFCI plug of G1215CM. This GFCI outlet will automatically conducts a self-test (auto-monitor) every 5 seconds to ensure the GFCI is continually working to protect people from electrocution, which exceeds the UL standards of self-test frequency of 3 hours. ??Always Safe? The GFCI features low power consumption and long service life. The surge protection and lightning protection function withstanding 6 kilovolt. Performed 6000+ times factory test, which is twice the testing times of UL standard. ??Water Resistant GFCI? Manual Reset GFCI (Ground Fault Circuit Interrupter) with LED indicator reaches Level IP65 water proof, waterproof rating exceeds level UL 50E-3R. Built in LED power indicator light to show when there is power. ??Easy to Install? No Grounding Wire Required. Provide 2 different grommets for wiring cable 14AWG, 16AWG and 18AWG. It's necessary to press the Reset Button for initial plug in. This is the newer model of our original GFCI plug of G1215CM, the size is more smaller than the original one. ??Wide Application? Durable industrial materials suit both for indoor and outdoor use in a variety of dangerous power tools, such as saws, drills, air compressors, lathes, lawn equipment, cutting machine, etc. UL CUL Listed.