The Stop Shock II Circuit Analyzer makes it easy to test GFCI receptacles and determine the appropriate wiring correction needed. This GFCI tester uses advanced circuitry and a patent pending proprietary design to precisely detect the required low resistance on ground wire and provides a clear and easy to understand single LED read out indication for correct wiring or bad ground, open neutral, hot or GND reverse, Hot or NEU reverse and open hot wiring errors without the need to memorize or decipher a dual indication chart. The Stop receptacles require GFCI test function to test outlets wired in parallel to GFCI circuits (bathroom, kitchen and outdoor receptacles require GFCI protection). Designed for the jobsite this tester features Hi-impact ABS housing with a 250 lbs. crush rating and the ability to withstand drops of up to 10 feet. Backed by a lifetime warranty this tool will speed up the testing process and increase your productivity for years to come. Advanced ground testing circuitry precisely detects the required low resistance valuesDetects Low ResistanceBright 360 degree viewable LED indicator lightSingle LED provides immediate indication of the wiring error, no need for a chart to carry, memorize or interpretBeeping audible indicator confirms test completionHi-impact ABS housing withstands a 10 ft. drop and offers a 250 pound crush ratingYellowThe Stop Shock II Circuit Analyzer makes it easy to test GFCI receptacles and determine the appropriate wiring correction needed. This GFCI tester uses advanced circuitry and a patent-pending proprietary design to precisely detect the required low re