Accurate And Fast: The detector adopts high-sensitivity intelligent Mini sensor chip, which can accurately and quickly find the edges and centers of metals, studs, joists, pipes and AC lines behind walls, floors and ceilings. detection can save users' time and energy and make it easier to complete tasks. Regardless of professionals, homeowners and DIY enthusiasts, this must be the ultimate choice. 5-in-1 Depth Detection: This stud detector wall scanner has 5 scanning modes. Upgraded 5-in-1 mode provides users with more detection requirements. Digital LCD Display And Audio Alarm: The stud detector is equipped with a large LCD display and audio alarm, which helps to detect the accurate position of the object, in addition to displaying the detection mode, center point, low battery indicator, etc. When the material is found, the LCD display and audio alarm will tell you if you are closer to the target. Auto-Calibration Provides You With Maximum Reliability And Accuracy: In the stud/deep mode, place the LCD display on the wall where you want to check the calibration; in the AC/Metal mode, place it in the air for calibration. Usage: Quickly locate wood, metal and AC wires hidden in the walls, floors and ceilings of houses. It can work in slats, wallpaper, wood floors, soundproof ceilings, painted walls and other places. Avoid danger when installing TV, cabinet, garage rack, etc. Model: HLW330 Name: Multifunctional Wall Scanner 5 in 1 Stud Detector Battery Model: 9V 6F22 battery (not included) Power Type: Battery-Powered With LCD Screen Or Not: Yes Colour:black-silver Material: ABS Size:about 152 x 62 x 28 mm Package Contents: 1 x Wall Scanner 1 x Manual(English)