Stud Finder,VSTM 4 in 1 Multi Function Electronic Stud Sensor Wall Scanner Detector Center Finding with Digital LCD Display for Studs Wood Metal Live AC Wire Detection [Accurate Sensor Technology]: The VSTM Stud Finder Wall Scanner is an electronic stud finder with advanced sensors technology which can locate studs/wood/AC wires in multiple locations on your wall accurately. Whether you are a professional, homeowner or a DIY enthusiast, you can control it quickly and easily. [4 In 1 Multi Functional Wall Detector]: The digital wall scanner provides four scanning modes in total for detection. The STUD SCAN detects wooden beams and joists in drywall up to 0.75 inches; DEEP MODDE detects wood and metal parts located up to 1.5 inches; METAL SCAN detects pipe, rebar, aluminum and copper up to 2.36 inches; and AC SCAN for locating live AC wires up to 2 inches. [Graphical LCD Display]: The wall scanner features a large LCD display and a loud sound warning. When finding the material, the LCD display will indicate the direction and the intensity of beeping tells whether you are more close to the target. The fast detection saves users time and efforts, making the task completion EASIER. And the Low Battery Indicator icon displays when the battery level is getting low, reminding you to replace a 9-volt battery. [Not Included Battery] [Automatic Calibration]: The wall detector stud finder would automatically calibrate itself when it is on. The calibration is done by positioning the device on the wall where there is no wood studs, AC wires or metal. The stud finder will indicate whether it has been already calibrated or not. The automatic calibration is accurate and precise, providing users with maximum reliability, greatly reducing errors in application and makes sure that most objects behind the wall can be detected. [Wide Uses and Warranty]: The stud finder wall scanner can quickly locate the edges and center of metal studs, pipes, rebar, joists behind walls, floors and ceilings as well as the live AC wires, help you avoid hazards while installing TVs, cabinets, garage shelves etc. We guarantee 12 months money back and quality warranty. If you have any problem during using, please contact us & you will get timely and friendly customer service. 1 x Stud Finder <span class="a-text-bold">(Not Included Battery)</span> 1 x User Manual Before scanning, please check the thickness of the position be detected is fit for detection. Detection depth and edge detection can vary due to moisture content of materials, wall texture, paint, etc. While calibrating, the device must not be placed directly over a stud, dense material such as metal, over a wet or newly painted area, it will not properly calibrate. Avoid placing your other hand, or any other part of your body on the surface being scanned, which will interfere with the performance of the scanner. Detector will not detect AC live wire from a shielded position. Take care when working near the electrical wires and always turn off the power supply. Hold the stud finder properly and move it slowly in one direction to obtain the optimum scanning results.