The Ridgid CM-100 Micro Clamp Meter is a true RMS and AutoRanging digital clamp meter with a large capacity and measuring range It can clamp around cables up to 30mm OD and measure current up to 1000A ACDC The clamp meter can also be used as a multimeter for 8 other functions and will provide clear and accurate readings on its large backlit LCD The slim and double-moulded design provides easy one-handed operation and can be conveniently used in confined cable compartments Supplied with soft carrying case test leads Type K temperature probe and 9V battery Functions and Range Voltage ACDC 400mV - 600V Current ACDC 40A - 1000A Resistance 400 - 40M Capacitance 4nF - 40mF Frequency Up to 4kHz Diode Test 15V Continuity Test 35 Temperature -40° - 1000°C Specifications Power Source 9V battery included Display 4000 Count backlit LCD Clamp size Max 30mm OD cable Overload protection CAT III 600V Polarity Indication Yes automatic Auto Power-Off Yes after 20 minutes AutoRanging Yes True RMS Yes Data and Peak Hold Yes Bar Graph Display Yes