Ensure safety at the jobsite with this 50 ft. 12/3 SJTW Lighted CGM Extension Cord. Featuring continuous ground monitoring (CGM), you“ll be able to ensure your electrical equipment is properly grounded. The connector includes a green ground check light that lets you know the cord“s electrical current is safely grounded, and an amber power check light on the plug that indicates power delivery through the cord. With a cold-weather jacket rated at -40°F, you“ll have the flexibility to get the job done in temperatures below freezing.