This meter uses large scale integration and unique function circuits. It can measure AC Voltage， DC Voltage， AC Current， resistance， and fulfill audible continuity test. With the function of phase indication and identifying live-wire， this clamp meter is an ideal instrument for electricians.General Specifications:Display: 3.5 digital LCD with a MAX reading of 1999， Auto polarity displayMeasure method: double integral A/D switch implementSampling speed: 2 times per secondOver-load indication: \"1\" is displayedoperating Environment: 0~40 Celsius degree，