The Stud. Sensor e 5 0 quickly & easily locates the edges of wood & metal studs & joists behind walls floors & ceilings. It&8217;s easy-to-read display screen indicates stud edges the patented Spotlight. Pointer shines a beam of light on the wall to identify the target & Wire. Warning: detection indicates the presence of live AC voltage. It&8217;s new patent-pending pinch grip & contoured shape provide an easy secure hold in either hand at any angle. Locates the edges of wood or metal studs up to 3/4 inch (19 mm.) deep. Easy-to-read LCD display indicates when a stud edge is approached. Updated Spotlight. Pointer shines an arrow-shaped light on the wall to mark the target. Wire. Warning: detection indicates the presence of live unshielded electrical wiring up to 2 inches (51 mm.) deep. Should scanning begin over a stud Zircons patented over-the-stud indication alerts the user to start the scan in a new location? Patented Tru. Cal technology indicates when the tool is calibrated & ready.