Review on LCD Display Stud Finder Sensor with Sound Warning, Automatic Correction, AC Warning Function - Smart Stud Sensor for Detection of Wood, Live AC Wire, and Metal Studs by Jack Boldt

We were just remodeling our basement room and this came in handy for finding pins for shelves and pictures. It comes with a good mechanical tenon marker and this tool is useful for finding the edges of the tenon. I would give it 5 stars but the instructions are a bit confusing - probably a bit lost in translation. If you're training at a well-known location, it's pretty obvious how you're going to use it.