The Gray Ghost Amphibian underwater headphones for the Minelab Equinox Series Metal Detectors.
Designed for the Minelab Equinox 600 and 800 metal detectors.
They are rated to minimum of 30 feet.
The Gray Ghost Amphibian use a 50mm piezo and care constructed so the units offer a sound chamber surrounding the piezo which gets the buzzer to make better tones.
The volume control is the key for the Minelab Equinox Series Metal Detectors.