Product details:

Ideal for scuba diving, snorkeling, or wading. Search for treasures while exploring reefs or the shallows of lakes rivers or streams. Includes integrated waterproof headsets. 10-inch search coil that works up to 10 meters (33 feet) under water. Sensitive to treasures buried up to 8-Inch under sediment. The latest in state-of-the-art discriminating technology; audio alarm & red LED flash alert. Operates up to 10 hours with (8) AA batteries (not included) Length adjusts from 42 Inch to 48 Inch.