Review on Advanced 5-in-1 Stud Finder Wall Scanner with Intelligent Microprocessor Chip and HD LCD Display - Locate Studs, AC Wires, Metal Studs, Joists, and Pipes with Precision by Prince Burr

I've tried and tried to get this thing to read accurately but it won't. I'm not a construction worker by some reports, but I'm a certified auto mechanic and licensed aircraft mechanic, so I'm familiar with the tools. and I don't like it either) Find one that doesn't need to be calibrated before use. I did exactly that and it cost about $30 and it cost extra money to avoid the aggravation. It works great and all I have to do is turn it on and go. Believe me, it's not worth the hassle here.