Fisher 1280-X Aquanaut Underwater Metal Detector

Operating at 2.4kHz, the Fisher 1280-X can be submerged an astonishing 250 feet underwater, and comes with submersible headphones. 

Use the Fisher 1280-X in salt or fresh water, or on land. It includes discrimination, and trash rejection with patented quartz-crystal circuitry. Other features include manual or auto ground balance, sensitivity adjustment, one tone audio, and you can also mount the control box on a belt for easier underwater use. 

Enjoy up to 75 hours on 8-AA batteries. 2-year warranty, and a 10.5" inch round concentric coil.