1、LED Display: This wall stud sensor has a large LED display, the LED display indicator will provide you with clear directions and accurate target locations. 2、4 In 1 Stud Detector: This wall stud sensor features a stud scan mode, depth scan mode, metal mode and AC mode to help detect precise positions. 3、Automatic Calibration: This stud detector is automatically calibrated to ensure that calibration is carried out where there are no studs or AC wires nearby, it effectively scans wood and AC wires. 4、Probe Warning: Our stud finder gives you accurate warning of metal or wire to avoid drilling holes or other accidents in metal or wire. 5、Upgraded Sensors: Our stud finder features an upgraded sensor design to ensure it can quickly locate metal studs, pipes, rebar, joists and AC wires behind wall, floors and ceilings. 1 x Wall Detector1 x User Manual  Item Type: Stud Finder Wall ScannerProduct Material: ABSUse: Wall DetectorPower Supply: 6F22, 9V, 60mAh (Battery Not Included)Weight: Approx.190g / 6.7oz