From Toys and Things. Piccadilly centre, Wollongong. Hobby shop Selling everywhere we can. Authorised Minelab dealer for the Illawarra south coast. Wireless Module WM12 Application: This module provides clear wireless audio without any perceivable time delay. Use the built-in speaker or your choice of headphones. *The WM 12 Wireless Module is not waterproof. Supplied with GPZ 7000. Compatible Metal Detectors GPZ 7000