Multi-purpose device!

[pito]

it is a bad idea to use magnetometer for diamagnetic, paramagnetic.

[Detectorist#1]

see my post #8

[ivconic]

Now, let to be serious - at which stage is your idea for big business with Chinese peoples?

More projects waiting aproval by Aliexpress too.
Soon!
So far only this:

https://www.aliexpress.com/item/1005007438681332.html