Pro Glo SJTW (300V) jackets offer high visibility for safety underfoot and extra flexibility in cold weather. The triple tap connector provides three standard 15A-125V outlets for additional power where it’s needed. Each male plug has a built in amber neon light which indicates that there is power in the cord and outlet. In addition, the Continuous Ground Monitoring (CGM) feature indicate there is a continuity in the ground wire throughout the extension cord. If the green neon light inside our clear molded connector is not lit, there has been a loss of ground continuity.