Ruby Electronics DT-3347 1000 Amp Clamp-on AC/DC Current Voltage Capacitance Frequency Resistance Temperature Meter True RMS 1000A True RMS, 4-digit display count Electronic overload protection, Continuity buzzer & Diode check Data Hold function, DCA Zero function Peak Hold Function, Double molded housing LCD with fast 40 segments bargraph, Low battery indication, Auto Power Off