MAIN TECHNOLOGY PARAMETERS Maximum dttecting depth ：1.5m ? Basic frequency：465Hz±2KHz Signal frequency：454Hz±2Hz Working current：9V "AA"(AA)?6 Power：0.6W weight ：2Kg MAIN FUNCTIONS 1.With ground balance circuitry to eliminate the influence by ?mineralized reaction?,so enhance detecting depth and accuracy greatly. 2.Distinguish ferrous and non-ferrous metal 3.Adopt intelligent operating system 4.Adopt body-engineering streamlining design 5.recognize metal sound by earphone 4.pack with high-strong ABC material,light and long-lived