It has an expiration date. At some point, one of the rods will break. So far, over time, 3 that I have bought have broken.

I measured soil into which I had poured vinegar, and immediately the needle showed a reading of 4. That is, very low pH => high acidity. The meter works satisfactorily. At first I had doubts, but I found that it works properly. Even in borderline acidity or alkalinity, the needle will show something.

In terms of soil moisture, as a general overview, it is very useful. Many times it deceives the soil superficially, and the moisture is found deeper. It has covered me for the balcony plants.

Whatever measurements. It shows a red indication on wet soil, no change in indication on light darkness and ph in any kind of soil.

This device does not work. Under the light, it shows darkness. If you put it in dry soil, it shows moisture. And the soil's pH does not change even in different types of soil.

I don't know if it's defective, but it doesn't give accurate measurements. I put my finger in the soil and it's moist, while it shows almost red. Good thing I noticed before all the plants rot. Money wasted