Underwater detector beach and underwater metal detector Excalibur II Professional Beach and Underwater Detector Product Introduction Features: [1]The World’s Best Underwater Detector [2]Minelab’s unique Broad Band Spectrum (BBS) technology, combined with superior ground rejecting technology, makes the Excalibur II the ideal underwater machine. [3]The unique design of the Minelab Excalibur II allows you to use it as effectively in or out of the water - this amphibious machine can move seamlessly from land, beach and wet sand conditions to underwater depths of up to 200ft (66m).