For optimum scanning results, How to do with your wall detector GVDA GD216 Handheld Multifunction Wall Detector Metal Wood Cable Wire Stud Finder Scanner LED DIY Tester
• Avoid wearing jewelry such as rings or watches when using the detector. The metal may cause inaccurate detection.
• Move the tool uniformly on the surface without lifting it off or changing the applied pressure.
• During the scan, the tool must always be in contact with the surface.
• Make sure that your fingers of the hand holding the tool do not touch the surface being scanned.
• Do not touch the detector or the surface being scanned with your other hand or any other part of your body.
• Always detect slowly to achieve maximum accuracy and sensitivity.
