Ξύλο που λειτουργεί το φορητό ανιχνευτή μετάλλων βελόνων με την μπαταρία 6F9v

Wood Working Portable Needle Metal Detector With 6F9v Battery TY-28MJ Hand held type broken needle detector, it is called portable needle detector,which is small size and easy to carry by hand,It uses principle of magnetic field,can effectively detect out the exact location of the broken needle or Fe,which is especially suitable for the thin and small goods,After detection by the big standing needle detector,use this portable one to find the exact location of the broken