1It is easy to find the center of the stud and accurately locate hidden metal pipes, fire wires, studs and wooden frames. 2Within a certain wall thickness, it can detect wood metal stems, metal pipes and live wires in the wall. 3LCD screen with backlight, audio and visual indication (sound reminder and easytoread LCD display). 4Automatic calibration of metal, voltage and stud detection, automatic shutdown function, energy saving and power saving. 5Made of highquality ABS material, waterproof and wearresistant, not easy to damage, and long service life. Condition: 100% Brand New Item Type: Wall Scanner Material: ABS Weight: Approx. 185g/6.5oz Product Size: Approx. 15.5 x 7 x 3cm/6.1 x 2.8 x 1.2in 3 Detection Modes: Scan Mode, Metal Scan Mode and AC Line Scan Mode Can detect wood and metal stems, and the wall thickness is within 38mm/1.5in Can detect metal pipes, the wall thickness is within 76mm/3in Can detect live wires in the wall, the wall thickness is within 76mm/3in Operating Temperature: -20 to 50 Power Supply: 1 x 6FF22 9V Battery (Battery Not Included) 1 x Wall Scanner(Battery Not Included) 1 x Instruction 1. Please allow 0& 8209;2 cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.