Utilizing patented IDEAL technology, the SureTest circuit analyzers "look behind walls" to identify wiring problems that can lead to personal shock hazards, electrical fires, or equipment performance issues. Personal shock hazards stem from poor grounding, false grounds, and/or no ground fault protection. Measures voltage drop under 12, 15 and 20-amp loads. The SureTest Circuit Analyzer takes only seconds to test each outlet and circuit under a full load. This test tool checks for various wiring conditions including: correct wiring, polarity reversal and no ground. A simple menu gives access to measurements of line voltage, voltage drop under a full load condition, ground-neutral voltage and line impedances. Includes 1’ plug adapter, carrying case, instruction manual. Optional alligator clip adapter available.