BAG & SIFTER ALLOW FOR GREAT EASE-OF-USE; FEATURES THREE DISTINCTIVE ALERTS FOR DIFFERENT TYPE OF METAL; FERROUS/NON-FERROUS DISCRIMINATOR DISTINGUISHES IRON/STEEL FROM SILVER/GOLD; 1-TOUCH AUTO-TUNE & VERY LOW FREQUENCY DESIGN FOR ACCURATE DETECTION; GROUND CONTROL TUNES OUT FALSE SIGNALS IN AREAS WITH PROFUSE MINERALS ; VIEW METER & POINTER WITH FERROUS & NON-FERROUS INDICATOR LIGHTS; FRONT MOUNTED .125" HEADPHONE JACK; REQUIRES TWO 9V BATTERIES; 5-YEAR WARRANTY