Zircon 61960 Stud Sensor with DVD, 9 V Battery              Locates the edges and center of wood and metal studs and joists behind walls, floors and ceilings. CenterVision technology finds the center of studs in a single pass. Its easy-to-read display screen indicates directions, edges and center of studs, while WireWarning detection indicates the presence of live AC voltage. Used in applications such as hanging heavy cabinets, pictures, mirrors and shelves securely, ceiling fans, grab bars and chandleiers, drapery rods and closet organizers, Install outlets, dimmer switches and cable lines. "SpotLite Pointing System" and audio tone signals when the stud center is reached. ACT (Auto-correcting technology) automatically corrects common user errors, such as when scanning begins over a stud.