The 7 in 1 Handheld Digital Wall Metal Detector quickly locates wood, metal and AC wires hidden in the walls, floors and ceilings of your home. It works on slats, wallpaper, wood floors, acoustic ceilings, painted walls and more. Avoid the dangers you encounter when installing , cabinets, garage racks and more. The Seven Functions: 1. Wood 3 depth 0.5 inches 2. Wood 3 depth 1 inch 3. Wood 3 depth 1.5 inches 4. Metal Detection 5. AC 6. Metal detecting depth 7. Metal to distinguish whether with magnetic Model:-QB6 Name:Nail finder, handheld wall metal detector (WALL STUD FINDER) Battery:9V battery (battery not included) Battery model:9v battery 6F22 Weight:187G Please note:There is a slight color difference or difference in kind, it does not affect the use, please do not mind, thank you! Colour:Black Material:Plastic Size:195x88x38MM Package Contents: 1 * Stud finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.