Optical and acoustic indicator for easy detection of metals, gold, and silver. Equipped with a 3.5 mm mini jack headphone socket for audio. Waterproof coil with a length of 20 cm. Features a practical arm support for comfortable handling, even during extended use. Adjustable length as needed (approximately 80-108 cm). With this metal detector, you are well-equipped for small treasure hunts. The detector has an intelligent search function and ensures a long operational duration thanks to its arm-supporting design. Additionally, the coil is waterproof, making the detector suitable for beach searches as well. You can also easily and flexibly adjust the length according to your needs. 2 modes: Metal, Disc. Sensitivity (maximum depth): approximately 18 cm. Operates with 2 x 9-volt batteries (not included).