Name: Nail Finder, Handheld Wall Metal Detector (WALL STUD FINDER)Quantity: 1,Packaging method: Color box packagingSeven functions: 1. Three pieces of wood with a depth of 0.5 inches.2. Three pieces of wood with a depth of 1 inch.3. Three pieces of wood with a depth of 1.5 inches.4. Metal detection.5. Alternating current.6. Depth of metal detection.7. Distinguish whether metals are magnetic.Model: HW-710Certification: CE FCC RHOSPackaging size: 174 * 76 * 41MMWeight: 170GBattery: 9V battery (shipped without battery) Battery model: 9V battery 6F22Purpose: Quickly locate wood, metal, and AC wires hidden in the walls, floors, and ceilings of a house. It can work in Flat noodles, wallpaper, wood floor, acoustic ceiling, spray painted wall and other places. Prevent you from encountering danger when installing televisions, cabinets, garage racks, etc.Attention: Light reflection and different displays may cause slight color differences between the items in the picture and the actual product. The allowable measurement error is+/-1-3 centimeters.