What is the name of the tool in the picture?

Kiwozzie, I agree, I work in a home improvement store and sell plenty of stud finders and none of them look like this

Kiwozzie, Agreed, never seen a stud finder look like that. Got it right, but just because the others seemed less likely.

I have used a few stud finders and none have looked like this!

Ok, I give up .How do you hold this thing ?

Bad question. My stud finder also identifies electric wires.