Product Material: ABS Size: 17.2 * 7.6 * 3.7cm Color: Silver Black Quantity: 1 Measure the center range of the wooden pole: 1:1.9 cm, 2:3.8 cm Measure the metal gear: 6 cm Measure the live wire on the wall: 5.1 cm Package Content: 1 * Detector, 1 * Instructions (excluding batteries) 1. Accurate wall scanner: The stud detector adopts the most advanced sensor system, which has been tested and upgraded for many years to ensure its accuracy. It can quickly locate double headed bolt wood metal and live AC lines. Whether you are a professional, homeowner, or DIY enthusiast, you can use this convenient tool to reap huge benefits. Just calibrate the tool before each drilling scan 2.4 in 1 scanner+depth detection: The wall scanner includes four different scanning modes for wood, beams, joists, metal, AC wires, as well as deep buried objects in floors, ceilings, and behind walls.