4 SCAN MODES UP TO 60MM DEEP - The bolt locator has multiple functions to quickly and easily locate wooden metal bolt beams, metal pipe threads and live AC wires behind walls , floors and ceilings. Studs can be swept through a layer of drywall up to 0.75 inches (19 mm). The dips can scan 2 layers of drywall up to 1.5 inches (38mm) deep. The stud deep scan mode is a high sensitivity scan mode that should be used when there are additional layers of coating wire WSRNNING indicator, no worries about drilling into live wire warning detection up to 2" (51mm) deep. As a bonus, when scanning in Studscan/Deepscan/Metalscan modes, Wire Warning is always on, alerting you to the presence of live, unshielded AC wires up to 2 inches (50mm) deep. Avoid drilling or hammering water pipes. or wires. Whether you're a pro, homeowner, or DIYer, you'll find it of great use. Easy-to-read LCD display + Weld warning helps find stud centers and DEGES EASY - displays required studs CENTRAL AND PRECISE POSITION - The digital stud finder features a large LCD display and audible warning to detect the exact location of the object. When a substance is found, the LCD screen will indicate the direction and intensity of the beep to let you know if you are close to the target. Quick detection saves the user a lot of time Note: The data is manual measurement, please allow 1-3cm error, due to differences between light and color. screen, there will be a certain color difference, the specific received in kind prevail.