Features The HANMATEK Stud Finder Wall Scanner Detector presents a robust and professional tool capable of 5 modes of scanning perfect for detecting nails screws rebar wooden beams and wires hidden behind walls floors and ceilings With the signal strength display area the detection depth distance is clearly visible on the LCD screen It also displays the scan mode detection strength battery status and central locating spot providing a comprehensive readout during use The automated calibration feature of this device ensures fast and accurate results Note that calibration must be done without the presence of nails AC wires or metal to maintain the accuracy of the results The HANMATEK stud finder ensures simple usage with a sound alarm which can be muted and a tri color light indicator green for no object detected orange for object edge detection and red for stud center detection It is vastly versatile in application making it an ideal support in avoiding hazards while installing TVs cabinets and more in a home environment Specifications Brand HANMATEKModel SF1Type Wall DetectorScanning Function Stud scan exact mode 0 8 inch 20mm stud scan deep mode 1 5 inch 38mm AC Wires scan 2 inches 50mm Ferrous metals scan 4 7 inch 12cm Non ferrous metals scan 4 inches 10cm Display HD LCD Display with signal strength display area Calibration Automatic Calibration Indicators Audible alarm and 3 color indicator lights Ergonomic Design Rubber backing to preve