Extech CT70 AC Circuit Load Tester AC Load Tester, Selectable loads of 12, 15 and 20 Amps Displays Peak Line Voltage and Frequency, Outlet Tester functions, Neutral to Ground Voltage Measures loaded and unloaded AC Line Voltage Hot, Neutral and Ground Impedance. GFCI Trip Time, GFCI Trip Current, Open or Reversed wiring.Complete with AC test cord