The Surfmaster PI Pro beach is a Pulse Induction detector, waterproof (10 metres) for use on the beach and in the surf. There is no form of discrimination but the ability to punch through the salt wet sand is its strong point. A choice of black lightweight (Beach) coil or weighted yellow (Diver) coil will give the best use in your preferred environment both machines are equipped with waterproof headphones and hip mount facility is built in. Warranty: 1 year. Weight: 1.73kg.