You may need a reliable helper when you need to renovate the house, repair the pipes in the garden, and look for the wires in the walls. This wall detector will be your most loyal partner.The stud beam detector is a device used to determine the exact position of the frame stud in the wall. This multi-scanner stud detector uses electronic signals to quickly locate the edges and centers of metal, studs, joists, pipes, and live AC wires behind walls, floors, and ceilings.The cost of a stud detector wall scanner is almost always lower than the cost of repairing damage caused by not being positioned before hanging something. Take it home and start your project safely!The stud detector can quickly locate the metal, studs, joists, pipes, and live AC wires behind various walls, floors and ceilings.-Specification-LCD size: 2.7 inches diagonalMeasurement accuracy: ± 4%Maximum sensing depth: 3/4 inch (19mm)Sensor size: 40x40mmWorking temperature: 0~40°C (32~104*F) @5~95%RHStorage temperature: -10~50°C (14~22°F)Measuring range: drywall and masonry: 5~70%; softwood and hardwood: 5~75%Maximum measuring range: 0~99.9%Audible alarm: wood ≥ 16%; dry wall and masonry ≥ 70%Size: 150x 67X 28.5mmWeight: 160gPower supply: 1* 9V batteryMoisture measurement range：5%~75%Measurement error： ±4%Inductive Sensor Size：1.6X1.6in.(40X40mm)Display Resolution：0.1%Auto Power Off Trigger：5 minutes of inactivityCommonly used tested materials comparison tableWhitewashed wall: lime wall, soil wall, cement wall, roofBrick wall: brick wall, stone wall, floorCork: Merlan, Fraxinus mandshurica, Fir, Maple, Camphor, Sandalwood, Oak, Cherry, Basswood, Larch, Masson Pine, BirchHardwood: teak, mahogany, walnut, white red bean tree, rubber tree, elm, poplar,Oak, beech, cedar