Stud finder is professionally designed stud finders uses the UPGRADE INTERNAL SENSORS. It senses a change in density in the space behind the wall and locates the stud center with GREAT ACCURACY. In additions. The shape of this wall scanner also shows the edges of the stud. The center of a stud is the secure location when mounting anything . The edges help you to recheck the locations. Take it home, makes your DIY homework easier SCANNING MODES UP TO 60MM DEPTH - Stud locator has mufti-functions and can quickly and easily locates wood metal studs joists metal pipe rebar and live AC wire behind walls, floors, and ceilings. Studs can Mode scans through one layer of drywall up to 0.75 in.(19mm). Deeps can Mode scans through 2 layers of drywall up to 1.5 in. (38 mm) . Stud Scan Mode is a higher sensitivity scanning mode should be used when there are extra layers of wallboard. WIRE WSRNNING INDICATOR, NO FEAR OF DRILLING INTO A LIVE WIRE - Wire Warning Detection is up to 2 in.(51mm) . The added is the wire warning is ALWAYS ON while you are scanning in StudScan/DeepScan/MetalScan Modes, to alert you to the presence of live, unshielded electrical AC wires up to 2 in. (50 mm) , which helps you avoid drilling or hammering into a water pipe or electrical wire. EASY TO READLCD DISPLAY +SOULD WARNING HELPS FIND STUD CENTER AND STUD DEGES EASILY - Displaying the Desired Stud Center as as the Precise Position of the Stud - The digital stud detector features LCD display with the big sound warning to detect the location of the objects. When find the material, the LCD display will indicate the direction and the intensity of beeping tells whether you are closer to the . The fast detection saves users time greatly. Battery :1 X 6F22.9V NOT Including Colour:Silver+Black Material:plastic Package Contents: 1 x Stud Finder Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.