Klein Tools Clamp Meter CL320 400A AC Auto Ranging Multimeter (True RMS 600V DC Microamps Temperature Capacitance NCVT HVAC Circuit Diagnostic Tool) Planer Universal 20V MAX System Cross Compatibility: Universal 20V MAX System Cross Compatibility: Seamlessly powers over 200+ DeWalt 20V MAX cordless power tools and chargers Restricted Clearance Mechanical Chases: Clamping onto round black iron pipes and threaded couplings at offset approach angles up to 30 degrees where structural framing and adjacent lines block swing arcs Maximum Alternating Current: 400A AC Maximum Monitored Voltage: 600V AC 600V DC Thermal Monitored Scale: 40° to 1832°F Low Current DC Step Bounds: 200 µA DC Maximum Internal Resistance: 40 MΩ Maximum Capacitance Scope: 4000 µF Monitored Frequency Scale: 10 Hz 60 kHz Clamp Jaw Opening Span: 1 Operating within a certified CAT III 600V safety envelope