LED display.Divided into 6 parts of inspecting area, and when set to the highest grade, the machine can check out a metal small as a paper clip.With 100 grades of inspecting sensibilities, user can set up at any degree willingly. Capability of resisting electromagnetic interference and shake;With high power in calculation;Free to set up parameter, to set up secret code with the system;A remote control device;With the special material, the detector is against eroding, crashing water, moistness and fire without changing its shape;With alarming lights set in both sides of the gatepost.