Franklin ProSensor T9 Stud Finder, a quick and easy way to find studs behind walls. It features proximity indicators that notify you when approaching a hidden object behind the wall. It has a maximum detection depth of 1.6" and a wider 4" wide LED display to give you quick, easy and accurate readings. It is backed by a 1-year warranty. Franklin Sensors has built its reputation on professional-grade stud finders that give you accurate readings. The ProSensor T9 doesn't waste your time with calibration procedures or inaccurate readings. Just press and scan to find studs instantly.