AC/DC clamp probeAC: 130 A (40 Hz to 1 kHz)DC: ±180 A Product Description This is a AC/DC clamp on probe with high reliability, high precision and portability. It has true RMS value, can be used for low impedance voltage measurement, V~Alert detection and fire line judgment. It is fully functional and suitable. Factory, home use, an ideal multi-function clamp on probe for both professionals and instrument enthusiasts