Test GFCI receptacles and determine the appropriate wiring correction needed. 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. Includes a GFCI test function to test outlets wired in parallel to GFCI circuits (bathroom, kitchen and outdoor receptacles require GFCI protection). Hi-impact ABS housing with a 250 pound crush rating and the ability to withstand drops of up to 10 feet. Bright 360 degree viewable LED indicator light. Beeping audible indicator confirms test completion. 4" height x 2" width x 1.25" length/depth.Y Shelf pack: 5Brand:"SPERRY INSTRUMENTS"