Swarm Series MX 100E Digital Metal Detector with durable lightweight poly carbonate construction; Large simple to use digital backlit interface; 8 metal categories and adjustable discrimination; 3 elimination modes (All-Metal Coin and Jewelry); 4 individual HD audio tones; Signal strength and depth indicators in pin point mode; Quick release extension rod design adds up to 7"; Adjustable arm guard with strap; External 3.5mm headphone jack (headphones not included); Can detect quarter sized coins up to 10" away; 10" submersible coil; Right or left-handed use; Uses (6) AA-cell alkaline batteries (not included).