Eliminate the guesswork with this center detect stud finder that has depth detection for wood and metal. While traditional stud finders locate the edge of the stud, this one locates the center for a more efficient read. The finder is constantly calibrating to save time during use. Once the stud is located, an audible alert and directional LED (light emitting diode) arrows clearly notify the user. You can easily mark the center of the stud with the center marking channel. AC and live wire detection for added safety. Slim profile for easy use and storage. AAA batteries included. 3 year warranty.