【Easy To Use】: stud finder with audible alarm (can be switched off) and 3 color indicator lights, green light indicates that no target is detected; orange light indicates that the edge of the target is detected; and the Red backlight indicates that the center of the stud is detected. Ergonomic design allows comfortable grip at any angle. The rubber on the back can prevent damage to the wall, safe and convenient.<br>【Fast And Accurate】:The stud finder can be calibrated automatically, just press the metal detection button. Note: Auto-calibration must be performed without nails, AC wires or metal, otherwise the test results will be inaccurate.<br>【Wide Range Of Applications】: The wall stud finder quickly detects metal and wooden AC cables hidden in the walls, floors and ceilings of your home, helping you to avoid hazards when installing TVs, cabinets and more.<br>【Professional Stud Finder】: 5 scanning functions: Stud scan exact mode 0.8 inch(20mm), stud scan deep mode 1.5 inch(38mm), AC Wires scan 2 inch(50mm), Ferrous metals scan 4.7 inch(12cm) and Non-ferrous metals scan 4 inch(10cm). According to your needs, you can switch to the appropriate mode to help you find the edges and center of nails, screws, rebar, wooden beams, wires behind walls, floors, and ceilings.<br>【Easy To Read】: The signal strength display area on the display screen can clearly show the detection depth distance to the metal object. Scan mode, detection depth, detection signal strength, battery indicator and center point can all be seen on the screen.