Last stud finder I bought was in the '90s.
I'm now looking at all the stud finders and see that they have five functions, relating to four depth functions, and one looking for AC current function.
They all say to calibrate for the intended use.
Why can't I just set for the deepest depth, and check for a stud, and then set for AC wiring, and check for that?
What about where some drywall is 1/2", and some is 3/4"? What setting would one use?
Why so many depth settings?
TIA