3 DISTINCTIVE ALERTS FOR DIFFERENT TYPES OF METAL; FERROUS/NON-FERROUS DISCRIMINATOR DISTINGUISHES IRON/STEEL FROM SILVER/GOLD; GROUND CONTROL TUNES OUT FALSE SIGNALS IN AREAS WITH PROFUSE MINERALS; VIEW METER AND POINTER WITH FERROUS AND NON-FERROUS INDICATOR LIGHTS; SIDE MOUNTED 1/8" HEADPHONE JACK; 5-YEAR WARRANTY; REQUIRES TWO 9V BATTERIES