Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles

We recently moved into an older house, built in the 70s. Wasn't sure about the GFCI setup in the bathrooms so tested with this tool. Although the receptacles don't have the little push button, turns out many were GFCI protected. They did this by hooking all the protected outlets together and when a fault happens, it trips everything at the main box. Weird, but now I know.

This is an industry standard. I've had a lot of electrical work done on my place and was very pleased to see the journeyman electrician had one of these. He sang its praises for being inexpensive, essential for electrical household safety, super bright, fits just right in the hand (or small pocket), and the design is well-labeled and so easily read with the LCD screen. I was quite happy I bought it after hearing all that!!! Great for finding and fixing open ground and so many other issues. Put one in your electrical kit and stay safe!!

I use this to test the pedestal outlet(s) before I plug in when I’m camping. The helpful reviews with videos explained how to use it and convinced me it would help to protect my electrical systems.

Great tool. Does exactly what it is supposed to. High quality and a fair price.

Basic outlet testers are all over the place. I like the more straight forward lights on this one and that it shows the voltage. You can also use it to test GFCI. It is a little bit bigger than the cheap ones but I am happy to have this in my electrical tool bag.I don't like that I have to turn it on though. As soon as there is power to the unit (i.e. I plugged in it), it should turn on.

Last time I use a multimeter to check the voltage on an outlet, the probe sparked and melted. This experience was very scary and I am not going to try it again.This Klein GFCI outlet tester provides a digital reading just like a multimeter with just plug in which is safer. The extra function of checking correct wiring is a plus because I replaced two old GFCI outlets and this helped double check my work for safety as well as testing if the GFCI trip function works or not.This tester size is longer because of the detail display. And it is because of this, the price is slightly more than other basics tester.

This is really handy. Everyone has the testers that tell if an outlet is hot or not, or if it’s wired correctly, but this one will tell you how many volts is there too.Recently there was a problem and my hot stick and regular tester showed the outlet was good, an acquaintance had one of these and it showed the outlet was only getting around 112V, which is enough to cause a problem for 120V circuits.Very worthwhile to have for electrical work.

I use this to check my plugs, works well, is bright and easy to use.