Waste of money..... Stay away if you're looking for cables!!! Don't use it for that purpose. I tried it 5 points above an outlet and it didn't show any indication.... Don't trust it even as a joke!!!!
Actually, it showed in some and didn't show in others..... You don't play with electricity when it has such funny indications!!!

It was received a week ago and tested for detecting household wiring and underwater counter plasterboard that was installed behind drywall. I haven't tried anything for metal detection yet, but if I do, I will come back.
As another user mentioned below, it is good to make 1-2 passes over the area you are interested in, to make sure and center it correctly (it will center, don't worry). From there, depending on the material it detects, calculate the margin you need to leave and drill.
I give it one minus star because the sound of the alarm during cable detection is low (you need to have some quiet in the room you are in) and I didn't like it very much, despite the fact that I also have an indication on the screen. I would like to be able to adjust the volume of the sound. Otherwise, a purchase for amateurs (like myself) that is worth its money.
Cost (including shipping) is around €32.

It does the job but it's a bit of a hassle. You have to go over a certain spot multiple times for assurance. This is especially true when you have a heavily armored plate, for example. TIP. Safely drill where there is absolutely no indication.