The meter provide Auto and Manual ranging dual model, that will fit for different accuracy demand True RMS sensing meter provides accurate readings when measuring linear or non-linear loads, regardless of waveform, Overload protect,keep multimeter away from damaged by large current. Main measurement: AC / DC voltage, AC / DC current, resistance, capacitance. Diode / off measurement,temperature, frequency and duty ratio measurement.Data hold,Polarity identification Low voltage indication,Square wave output 6000 count Max LCD display. Measures AC/DC current 1200A ; measures AC voltage to 750V,DC voltage to 1000V The clamp meter is rated for CAT IV installations to 600V, change test model for different testing. Clamp test for Heavy Current only,please test other thing(voltage,temperature,resistance...) via probe.