AUTOMATIC TUNING & GROUND BALANCE ; POWER & SENSITIVITY CONTROL ; TRASH ELIMINATOR CONTROL TO REMOVE MOST UNDESIRABLE ITEMS FROM DETECTION; INCLUDES .125" HEADPHONE JACK & HEADPHONES ; TREASURE METER TO ;DETERMINE STRENGTH OF SIGNAL ; DETECTS COIN-SIZED OBJECTS UP TO 6" DEEP; LARGER OBJECTS UP TO 2 FT ; MOTION ALL-METAL MODE FOR DETECTING ALL TYPES;OF METAL ; 1-YEAR LIMITED WARRANTY