The Klein Tools CL700 True RMS Digital AC Clamp Meter, Auto-Ranging LoZ measures AC current in the clamp, the included thermocouple probe measures temperature, and included test leads measure AC/DC voltage, resistance, continuity, frequency, and capacitance and also tests diodes. The automatically ranging true mean squared (TRMS) technology offers increased accuracy, and the Low Impedance (LoZ) mode identifies and eliminates ghost or stray voltages.