You just want a fast way to find the studs behind your walls or ceiling without all the fuss. magnetic stud finders – More than a feeling Stud Magnet StudPoP® "Original" Smart Magnetic Stud Finder - No Batteries, No Calibration, 3x More Reliable, Perfect For Lat & Plaster, Metal Studs - Visual & Audible Indicator, Simple & Fun In It's not rocket science., It's a StudPoP, AMAZON CHOOSES COLOR. Bottom line: SAVE YOUR MONEY because most of them aren't very good at anything :( It doesn't get any easier than this! StudPoP® On the LEVEL Smart Magnetic Stud Finder – No Batteries, No Calibration, 3x More Reliable, Lath & Plaster, Metal Studs, Visual & Audible Indicator, Simple & Fun to Use, 1 magnets – 9 level PERFERRED BY OWNERS OF OLDER HOMES: Because of the way walls were done in the olden days, the StudPoP is the go-to stud finder for folks with those IMPOSSIBLE walls. MORE POWERFUL THAN THE COMPETITION: The StudPoP's unique design makes it much more SENSITIVE than ALL other magnetic stud finders, making it ideal for ANY construction type, including challenging surfaces like LATH & PLASTER and TILE. StudPoP® Original Smart Magnetic Stud Finder – No Batteries, No Calibration, 3X More Reliable, Perfect for Lath & Plaster, Metal Studs – Visual & Audible Indicator, Simple & Fun to Use – 1 Magnet Product Details Brand: StudPoP Shape: Round Item Thickness: 1 Inches Number of Pieces: 1 Brand: StudPoP Shape: Round Item Thickness... FUN & EASY TO USE: The StudPoP makes stud finding FUN with its 1 diameter moving magnet that gives an audible click and a visual movement when a fastener is found. DON'T BE FOOLED: All other magnetic stud finders only work on SHEETROCK. StudPoP Magnetic Stud Finder | No Batteries Needed, Works