Features: Come with High definition LCD screen and audio alarm, convenient to use. This will keep you away from AC power lines and no worry about safety hazards during construction. You can switch to the appropriate mode to help you find the center and edge of the wood, joist or beam, live AC wires and metal in the wall accurately. 4 in 1 Multi-function Detection: The stud scan features 4 modes: Stud scan: 0.75in/19mm deep, stud scan: 1.5in/38mm depth, metal scan: 2.36in/60mm deep, AC scan: 2in/51mm deep. Accurate Sensor: This stud finder equipped with upgraded sensor chips. It can accurately and quickly locate the studs, metals, pipes and live AC wires behind wall, floors and ceilings. Specifications: Material: Plastics Scan Modes: Stud Scan 1: 0.75in/19mm Deep Stud Scan 2: 1.5in/38mm Depth Metal Scan: 2.36in/60mm Deep AC Scan: 2in/51mm Deep Display: LED Backlight Screen Size: Approx. 76x172x37mm/2.99x6.77x1.46in Package Includes: 1x Wall Scanner note: 1x 6F22 9V batteries needed.(NOT Included) Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.