Review on Upgraded 6 in 1 Stud Finder Wall Scanner Detector - Electronic Sensor Wood Wall Detector Beam Finder with LCD Display & Sound Warning by Andrew Grimes

This is one of the most accurate wall detectors I have ever used and I have used many. As a DIYer, I try to do most of my housework but haven't always been confident with any of these tools, but I'll tell you right away that it recognizes wood and metal studs with no problem and gives me the confidence I need to drill. The audible sound also tells me where the center of the hairpin is. For the price you can't ask for more