[Four-in-one Depth Detection Function] - The wall stud finder includes four different detection modes: stud detection, depth mode, metal detection, and AC detection. [Backlit LCD Display and Audible Alerts] - This multifunctional wall detector features a backlit graphic LCD display that provides many clues during detection, such as detection mode, signal strength, self-calibration, battery indicator, and audible warnings. [Ergonomics] - The tool features a soft coating for a secure and comfortable grip, ensuring safe and comfortable use and preventing slipping. Its compact design saves space in your tool kit. [Self-calibration] - Once the stud finder is located, the LCD display indicates the direction, and the intensity of the audible signal indicates whether you are close to the target. To use the self-calibration function, place the device flat on the wall, turn it on, and press the "Scan" button to start calibration. Calibration is complete when the beep and display disappear. The stud edge flashes and a beep sounds. [Ease of Use] - The device has an LCD screen that clearly displays the results for easy reading. When a live wire is detected, a beep sounds to alert the user.