1,Nail Detector Wall Scanner uses advanced sensor technology to accurately and quickly locate wooden nails and metal hairlines 2,5 in 1 Depth Detection: This stud finder wall scanner has 5 scanning modes.3. Digital LCD display and audio alarm, the stud detector is equipped with a large LCD display and audio alarm, which helps to detect the exact position of the object, as well as display the detection method, center point, weak battery indicator, etc. When material is found, an LCD display and audible alarm tell you if you are getting closer to your target.4. Automatic calibration provides you with maximum reliability and accuracy. In stud/depth mode, place the LCD monitor on the wall where you want to check the calibration; in ac/metal mode, place it in the air for calibration.5. This wall screw finder can quickly locate wood, metal and AC wires on house walls, floors and ceilings.Product Name: Wall DetectorModel: WD-01Maximum detection depth:Ferrous metal: 120mmNon-ferrous metal (copper): 100mmAC: 50mmSingle-strand copper wire (greater than equal 4mm): 40mmWooden file: Precision mode: 20mm; Depth mode: 38mmAutomatic shutdown: after 5 minutes of inactivityPower supply mode: rechargeable lithium battery; Type-c chargingScope of application: Suitable for detecting hidden metals in walls, ceilings and floors (rebar, copper pipes), cables; electricity under wooden beams, metal, gypsum cables. Makes decorative drilling work safer.Product size: 138x68x22mmColour:black+yellowMaterial:ABSPackage Contents:1 x wall detector1 x charging cable1 x storage bag1 x Chinese and English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.