Features: Functions: 1. Wood with depth of 0.5inch, 2. Wood with depth of 1'', 3. Wood with depth of 1.5inch, 4. Metal detection, 5. alternating current power, 6. Metal detection depth, 7. Metal resolution for magnetic property. This handhelds nail trackers is small size and lightweight, easy to carry and operate. Sound and LED indicator light provide feedback, easy to locate the nail position. Adjust sensitivity to adapt to different wall. Usage: Quickly locate wood, metal, and alternating current wire in house wall, floor, and ceilings. It can works in wood floor, and other place. Avoid encountering danger when installing televisions, cabinets, garage racks,and more. Suitable for various wall, such as gypsums board, concrete wall,. Whether home decorations, office renovations, and building constructions, the nail finder can accurately help you find the metal structure inside wall. Light weight,easy to carry. Specifications: Material:ABS Color:White,Black,Yellow Power:1piece 9V Battery 6F22 (not included) Note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color Package includes: 1Piece Studs Finder