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. 5 in 1 Multi-function Detection: The stud scan features 5 modes: wood scan 1/2 inch(12.7cm), 1 inch (25.4mm) and 1.5 inches (38mm), Metal scan 2.36inch (60mm). Accurate Smart-Sensor: This stud finder equipped with upgraded sensor chips. It can accurately and quickly locate the studs, metals, pipes and live AC wires hide behind wall, floors and ceilings. Package Includes: 1x Wall Scanner Specifications: Material: TPE Size: Approx. 70x35x171mm/2.76x1.38x6.73in note: 1x 9V battery 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.