Additional Details ------------------------------ Product description: 8inch INTERCHANGEABLE, WATERPROOF SEARCH COIL ; 3 MODES OF OPERATION: ALL-METAL, DISCRIMINATION & AUTO-NOTCH ; 3-TONE AUDIO DISCRIMINATION ; TOUCH PAD SELECTION ; SENSITIVITY CONTROL ; DETECTS COIN-SIZE OBJECTS UP TO 8inch DEEP; LARGER OBJECTS UP TO 3 FT ; .25inch HEADPHONE JACK ; 5-YEAR LIMITED WARRANTY