1. Four Detection Modes This AC wire and metal locator features four detection modes to meet your needs. The 1/2' bolt scan detects wood or studs up to 13mm deep, the 1' bolt scan reaches 25mm, and the 1 1/2' bolt scan extends to 38mm deep. It also identifies magnetic metals up to 80mm and nonmagnetic metals up to 60mm deep. 2. Accurate Depth Display With a clear green backlight, this stud finder provides precise depth readings for hidden objects in walls, floors, and ceilings, ensuring visibility even in lowlight conditions. 3. Wide Compatibility Ideal for various surfaces like smooth plaster, wooden floors, acoustic ceilings, and spraypainted walls. for both residential and commercial projects. 4. Enhanced Safety Utilize AC mode to detect live unshielded AC wires behind walls. This feature safeguards against electrical hazards during installations of TVs, cabinets, and garage shelves.