Digital multimeter measures voltage, current, resistance, capacitance, frequency, and duty cycles True RMS (root mean square) meter provides accurate readings when measuring linear or nonlinear loads where the current or voltage has an undistorted or distorted waveform Measures duty cycles to 99.99%, indicating the percent of time a circuit is on Audible continuity sensor confirms a circuit conducts electricity, and a diode test detects proper functioning of a circuit's diodes Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category II installations up to 600V and Category III installations up to 300V