What do you call that cable thing that old service stations/gas stations had that ding when someone drives over it. Low tech and likely not expensive .
I want one but don’t know what it is called so can’t search.
It would save me a lot of grief re deliveries etc if I had something like that to let me know when someone came in the driveway.
If I’m in the house, I don’t hear vehicles driving up to the barn.