1. Use upgraded internal sensors. It senses changes in the density of the space behind the wall and can locate the stud center accurately. also. The shape of this wall scanner also shows the edges of the studs. The center of the stud is the safest location when installing anything heavy. Edges help you recheck the position. home and make your DIY homework easier 2. mode up to 60mm deep - The stud locator is versatile enough to quickly and locate wood metal studs, joists, metal tube rebar and live AC wires behind walls, floors and ceilings. Studs can be pattern scanned through a layer of drywall up to 0.75inch (19mm). Deeps can pattern through 2 layers of drywall up to 1.5 inches. (38 mm) deep. The deep stud mode is a higher sensitivity mode and should be used when there are additional layers of wallboard. 3. Wire warning indicator, 't worry about drilling into live wires - wire warning detection up to 2 inches. (51 mm) deep. As an added , wire warning is always on when you in StudScan/DeepScan/MetalScan mode to alert you to the presence of up to 2 inches of live, unshielded AC wire. (50mm) deep, which helps avoid drilling or hammering water pipes or wires. 4. At the same time, the LCD display can also display the required stud and the position of the stud, and display the exact position of the stud. When material is found, the LCD display will indicate the direction and the intensity of the beep will tell you if you are closer to the . The quick detection saves the a lot of time. 5. Not only provides you with high quality and high precision, also provides a of functions to meet your actual needs for drywall, lathe wall, ceiling, drywall, wallboard and more. Product size: 17.2 x 7.6 x 3.7cm Product net weight 160g Detection r: 19-51mm Detected metal size: 60mm Alarm Mode: Beep Battery type: 9V battery (shipped without battery) color:Silver Material:ABS Package Contents: 1 x Wall Scanner 1 x English manual Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.