DEWALT Stud Finder allows for fast and accurate detection of wooden or metal studs that, for example, support drywall. This enables error-free installation of various decorative elements and fasteners. The tool can also detect live electrical wiring to prevent accidental drilling. The design is made from high-quality plastic and is compact in size. There is a detection activation button and LED indicators. An audio signal is also provided. It runs on batteries. It can detect elements up to 3/4 inch deep and identify their center with 1/4 inch accuracy. Automatic calibration is included