Widely Use - Perfect for finding metal objects and anywhere that hidden metal needs to be detected. Adjustable Height of - You can adjust the connecting stem length for comfortable with adjustable height of arm rest, to make sure this detector is easy for people of different heights and ages. Waterproof Design - The WATERPROOF stem and coil enable you to use our metal explorer underwater, especially suitable for outdoor activities, on the beach or in the stream. But the control box is not waterproof. Detection Indication - Audio alert and pointer indicate the detection of metal. Headphone Jack - Let you connect headphones(not included) and operate without disturb, and the sensitivity is also adjustable.