Gardner Bender GRT-3500 Outlet Receptacle Tester & Circuit Analyzer, Indicates 5 Wiring Errors, Easy Read Chart, Comfort Grip, 120 VAC , Black

Works good and indications are accurate. My only complaint is the legend (key) of what the lights mean printed on the device cannot be read. The little ovals indicating on/off combinations are impossible to see. You cannot tell if the little oval is indicating on or off unless in bright light with the aid of magnification.

Just plug it in and you look at the lights and reference chart on the device. I wish the signal lights were a little brighter when used outdoors, but works well enough.

hard to read chart and orangish yellow or red light colors. i would compare with other models, to see if another might have more clear color coding and an easier to read sticker. only able to make out the color chart in bright light

Not much to say about a GFCI tester. A little less bulky than some. Solidly built. The neon lights are easy to see from all angles. The test button trips my GFCI. The big win is the price. Some dealers sell the same thing on Amazon for 3x the price. Sometimes without the test button. Every home owner and RV owner should have one in their toolbox. Maybe more than one as they seem to disappear in the night.

When using this product for some odd reason certain new types of outlets it will not go in and I have to literally jam it in to make it go in side the socket. I need to figure out why it keeps doing that. But overall it is a good product.

The fine print is a little hard to read. I had to use my phone as a magnifying glass.

It seems to work, great value for the money.

I ordered one and it would not insert properly into my Tamper Resistant Receptacles. I received a replacement and the same thing was true. I took a small metal file and 30 seconds on both prongs to remove any sharp angles - it now works perfectly and inserts smoothly to all of my outlets. Overall I am happy with this tester at this price but you may need to remove burrs or angles on the spurs so the shutters on a TRR open correctly.

Some receptacles are installed upside down which make the unit hard to use & read.

Easy to use