AUTOMATIC TUNING & GROUND BALANCE; POWER & SENSITIVITY CONTROL; TRASH ELIMINATOR CONTROL TO REMOVE MOST UNDESIRABLE ITEMS FROM DETECTION; DETECTS COIN-SIZED OBJECTS UP TO 6" DEEP; LARGER OBJECTS UP TO 2 FT; TREASURE METER TO DETERMINE STRENGTH OF SIGNAL; MOTION ALL-METAL MODE FOR DETECTING ALL TYPES OF METAL; REQUIRES TWO 9V ALKALINE BATTERIES ; 1-YEAR LIMITED WARRANTY