Featuring an enhanced LCD screen and illuminating target spotlight, the StudSensor Pro55 deep-scanning stud finder uses two scanning modes to find the edges of wood and metal studs and joists. Securely anchor mirrors, shelves and cabinets while also helping to avoid live, unshielded AC electrical wiring.Stud scan mode locates the edges of wood and metal studs up to 3/4 in (19 mm) deepDeepScan mode doubles the scanning depth to 1-1/2 in (38 mm)WireWarning detection indicates the presence of live, unshielded AC electrical wiring up to 2 in (50 mm) deepZircon’s patented “over-the-stud” feature alerts if scan begins over a studEnhanced LCD screen with target spotlight indicates approaching stud edge and illuminates when the stud edge is detectedSpotLite pointer shines an arrow-shaped image on the scanned surface to clearly indicate the edge of the studA “V” marker groove enables accurate marking of stud edge locationErgonomic grip for a secure hold in either hand at any angle