Features: Professional Precisions Detect wood/metal up to 20mm with this advanced wall scanner, perfect for locating edges when hanging frames, or planning renovations. Effortless single button operate features sliding detection mode, enhanced by alerts that intensify near targets. Ideal for enthusiasts, contractors, and homeowners requiring detection for secure installations in paneled surfaces. Simplifying wall mounting projects for artwork, shelves, or entertainment systems while avoiding electrical wiring during home improvements or commercial construction tasks. Engineered with ABS plastic housing and ergonomic grip, this electronic finder combines portability with professional accuracy through its directional light guidance systems. Specifications: Component: Plastic Size: about. 22cm/8.66in Battery: 1x 9V 6F22 battery requires (NOT include) Package Includes: 1pc Wall Scanner note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. 1pc 9V 6F22 battery requires, NOT include.