Four-in-one depth detection functionThe wall nail finder wall scanner includes four different scanning modes, namely, wall nail scanning, deep mode, metal scanning and AC scanning. Backlit LCD Display and Audible WarningThe multifunctional wall scanner sensor has a backlit graphic LCD display, which can show many clues during the detection process, such as such as detecting mode, signal strength, auto calibration, battery indication, sound warning, etc. Auto CalibrationAfter the stud finder finds the material, the LCD screen indicates the direction and the intensity of the buzzer indicates if you are close to the target. With automatic calibration function, put it flat on the wall, turn on the power button, then press the "scan" button to start the calibration. When the beep and the screen display disappear, the calibration is complete. The edge of the stud will flash and beep. Ease of UseThe device features an LCD screen displaying the results clearly and prominently for easy and intuitive reading. It beeps to warn the user when a live electrical cable is located. Ergonomics the tool has a soft grip coating, providing a firm and pleasant grip to guarantee handling safe and comfortable, preventing slipping. Compact design ensures space-saving storage in a tool bag. Battery not included