The Ground EFX Cyclone youth metal detector features a durable design built to withstand the rigors of child use, a simple eleminator control to eliminate most unwanted items and a visual target indicator with battery OK test. It can detect coins up to 5" deep and larger metal up to 24" and the 6.5" circular coil is submersible up to 24" deep. The volume level varies depending on signal strength and the unit is adjustable from 26" to 36" total length. Two 9V alkaline batteries are not included.