You have got you new Waterproof  Minelab Equinox 800 with Bluetooth headphones and the WM 08 wireless reciever, but the Wm 08 unit isnt waterproof neither are the Bluetooth Equinox headphones.

here with a cheap solution Paul Cee gives you a cheap solution to allow you to metal detect in the rain or water without fear of damaging the WM 08 Wireless module..