Tower Manufacturing 30338018 18" Length, 15 amp In-Line GFCI Cord Set With Auto Reset And Single Connectors 18-inch, 15 amp in-line ground fault circuit interrupter (GFCI) cord set for converting standard electrical outlets or extension cords into GFCIs to help protect from shock, electrical fire or electrocution Portable, single-connector cord set for use with standard 3-wire outlets or extension cords Red LED power indicator and test/reset button allow for periodic testing National Electrical Manufacturers Association (NEMA) rated for indoor and outdoor use in offices, schools, labs, homes, and on construction sites Two-year warranty