Features: Easily locate nails, screws, and metal items in wall with this versatile 4 in 1 electronic sensor. Accurately measure depths up to 120mm using the double head bolt locator. Automatic calibration ensures reliable results every time. Suitable for DIY enthusiasts, contractors, and homeowners, this tool simplifies wall detection tasks, making it essential for home renovations or installations. Perfect for various applications like shelf installation, mounting televisions, or running wires, this sensor is a reliable choice for homes, offices, and construction projects. Dustproof, anti drops, stable, and resistant to use, with an impact resistant shells and anti splashs water characteristics for daily use. Specifications: Material: ABS Size: approx 147x68x27mm/6x3x1inch Material detection depth Ferrousmetal: 120mm Non ferrousmetal (brass): 100mm AC:50mm Brass wire (240000 square millimeters): 40mm Foreign objects (usually referring to wood block): 20mm in actual modes/38mm in deep modes Automatic shutdowns for 5 minutes Package Includes: 1xWall Scanner note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.