DCM 39A Auto ranging 3 ¾ digit (3999) LCD-Display. Current Measurement upto 1000A. True RMS reading for ACV & ACA. 2 in 1 Clamp meter + Digital Multimeter. Overload protection for all ranges. Data Hold, Relative Key, Facility. Water resistance front panel, fireproof heavy-duty ABS casing. Current Sensor - Hall effect Sensor. Over range Indication: 'OL' or '-1' is displayed.