StudSensor 70 quickly and easily locates the center and edges of wood and metal studs and joists behind walls, floors and ceilings. Patented CenterVision technology finds the center of studs in a single pass. A built-in erasable wall marker allows for one-handed operation.Stud Scan mode locates the center and edges of wood or metal studs up to 3/4 in deepDeepScan mode doubles the scanning depth to 1-1/2 inLED lights indicate direction, edges and center of studsPatented SpotLite pointing system and audio tone signals when the stud center is locatedWireWarning detection indicates the presence of live, unshielded electrical wiring up to 2 in deepACT (Auto-Correcting Technology) automatically corrects common errors, such as when scanning begins over a studBuilt-in erasable wall marker enables users to mark targets with a simple push of a button documentation