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 (less than 10ohms) on ground wire and provides a clear and easy-to understand single LED readout indication for correct wiring or Bad Ground, Open Neutral, Hot/GND Reverse, Hot/NEU Reverse and Open Hot wiring errors without the need to memorize or decipher a dual-indication chart. The Stop Shock II includes a 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 lb 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.

Single LED provides immediate indication of the wiring error, no need for a chart to carry, memorize or interpret!
Advanced ground testing circuitry precisely detects the required low resistance values
Hi-impact ABS housing withstands a 10ft drop and offers a 250 pound crush rating
Bright 360 LED indicator light