Practical, easy to use, and does what it promises. The button for testing the relay does not respond instantly, so it needs a slightly longer press. Overall, a very nice tool! I got it after a recommendation from AI when I asked it to find me parts for building a DIV tool, AND I DIDN'T REGRET IT!

One of the most practical tools I’ve added to my equipment! This particular tester makes checking outlets a breeze. Its digital display is very clear and bright, and it immediately shows you whether there is any wiring fault, grounding problem, or incorrect polarity. It saves you a lot of time compared to sitting there measuring each outlet separately with the multimeter. You plug it straight into the outlet, see the reading right away, and keep on with your work. It’s small, compact, takes up no space in the bag, and is worth every euro. Five stars without hesitation!

Very good and convenient for checking sockets both for phase, neutral placement, and for the presence of grounding. The button for testing the relay is useful. The only problem I noticed is a difference of almost 5 Volts in the measured voltage, so confirm with a good True RMS multimeter.

It is an OK tester. In one installation it found incorrect measurements and it was later discovered that the apartment's grounding wire was not doing its job. So it did what it was supposed to do.

The great thing about it is that when the connection is incorrect, the color on the screen turns orange, and when the connection is correct, the screen turns green. This way, you have a faster visual indication between right and wrong. Another positive aspect is the test button to check if the escape relay is functioning.