Rroster Digital Clamp Meter, Measures Current, Voltage, Resistance, Continuity, FrequencyReliable Clamp Multimeter with True RMSAccurate AC DC voltage current, resistance, capacitance, frequency, temperature, diode, continuity test and non contact AC voltage detection, the Clamp Meter is fully functional and easy to use for labs factories radio technology and household. Auto Ranging with NVCThe meter will automatically select the appropriate auto range; NCV detects the existence of AC voltage on conductors and cables in wall,