2 wire. 16 gauge. Patented tamper guard rotary safety covers help protect against accidental shock. Maximum Amps: 13. Maximum Volts: 125. Maximum Watts: 1625. SPT-2, 2-conductor 16AWG. This is a polarized cord set. It has a polarized plug (one blade is wider than the other) and a polarized outlet (one slot is longer than the other). The polarized plug is not intended to be mated with non-polarized outlets (having both slots are the same size). A polarized outlet is intended to mate with a polarized plug in only one way (the longer slot with the wider blade). This Jasco product comes with a 90-day limited warranty. Visit www.jascoproducts.com for details. UL listed. Made in Philippines.