StudScan mode locates the edges and center of wood or metal studs up to 19 mm deep DeepScan® mode doubles the scanning depth to 38 mm LCD display indicates direction, edges, and center of studs and patented SpotLite® Pointer shines an arrow-shaped beam on the wall to mark the target WireWarning® Detection indicates the presence of live, unshielded electrical wiring up to 51 mm deep ACT™ (Auto Correcting Technology) automatically corrects common user errors, such as when scanning begins over a stud