This AC WORKS® brand outlet extender with 20A breaker [S520CB520-018] is a heavy-duty household adapter cable. This 1.5 -foot cord is a NEMA 5-20P to NEMA 5-15/20R. The NEMA 5-20P is a 20 Amp, 125 Volt plug. The NEMA 5-15/20R is a 15/20 Amp, T-blade female connector. The cable is an STW, 10/3, anti-cold weather cable staying flexible in extreme temperatures. The cord helps protect from an overload to your electrical breaker panel causing your machine to use more electricity than it should be. Included with your purchase is a 5-year limited warranty.