These phones are perfectly matched electronically with your EQUINOX series of metal detector, not only waterproof, but submersible to 200 feet. Phones have completely sealed speakers for each ear, comfortable ear pads (flexible) to create a perfect fit with adjustable non-breakable headband to fit each individual. Attention to detail even includes drain holes in each ear cup to balance pressure, no metal parts to corrode from salt water use, plus a very heavy-duty coiled cord with sealed waterproof connector. Made in Australia. Can also be connected to a WM 08 Wireless Audio Module.