Minelab Headphone Adaptor Cable 3.5mm (1/8-inch) to 6.35mm (1/4-inch)
Part No. 3011-0369.
Minelab Headphone Adaptor Cable 3.5MM (1/8″) TO 6.35MM (1/4″) For Equinox Series
Connect 6.3mm (1/4-inch) headphones to your detector or WM 08 Module with this handy adaptor. The 3.5mm (1/8-inch) end forms a waterproof connection so that the cable can be submersed- note that the 6.3mm (1/4-inch) end is not waterproof.