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From the Manufacturer The rugged Extech EX840 1000A AC/DC CAT IV clamp meter is designed to deliver safety and versatility — without compromising performance or innovation. You can take the EX840 on the job to leverage its advanced meter functions including True RMS AC/DC current and voltage, resistance, capacitance, frequency, infrared and contact temperature, diode-test, and continuity check. Complete with standard test leads, 9V battery, general purpose Type K probe, belt holster, and professional CAT III-1000V Test Leads.