Unreliable and confused only

I have the PMD 10 ordered for my father about 3 weeks ago. Already at the first test, I realized that the statements made about metal / steel, power lines or wood are extremely inaccurate.

Example 1:
I wanted to look at our wall by steel rods. It must be said that we live in a new building. The unit has beeped not only continuous, but also the removal of the device to "a metal object" was loud PMD 10 always minimal (status bar was completely knocked out), which according to its own Bohrerfahrungen in the wall can not be.

Example 2:
Now I wanted to check a power line in the wall. When my turn holding the device directly into the wall socket, it beeps (which is logical). I run it but then along a power line located in the wall, then nothing is displayed. The wall thickness is approximately 10-15cm. The equipment has been tested on both sides, but a power line it did not recognize from both sides.

Conclusion:
The device was tested several times in different locations. I come to the conclusion that the instrument confused a person more than it could really help someone. It shows there something where there is nothing and show where it should display something strangely, nothing is displayed.
At first I suspected a defect.
After I talked to a craftsman from this unit, he informed me that such devices in the "low Preikategorie" are actually useless, as they provide quite inaccurate results.

Maybe you can use in older buildings the unit yes. On three different locations (incl. Garden) I could not get any satisfactory results.

The device makes a stable impression and is beautifully finished. However, as a complete failure, the main function in my opinion for this "high price", I give the article only 1 star. The device is sent back to Amazon.