This AC WORKS Brand adapter is a NEMA 5-15P to NEMA L5-20R. The NEMA 5-15P is a 15 Amp, 125 Volt household straight-blade male plug. The NEMA L5-20R is a 20 Amp, 125 Volt locking female connector. The pigtail style adapter is 1-foot in length, is an STW, 12/3 and is anti-cold weather, staying flexible in extreme temperatures. The maximum operating power is 1875 Watts.