Optical and acoustic indicator for easy detection of metals, gold, and silver. Equipped with a 3.5mm mini jack headphone connection for audio. Waterproof coil with a length of 20 cm. Features a practical armrest for comfortable handling even during prolonged use. Flexible length adjustment 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 long usage time 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 as needed. 2 modes: Metal, Disc. Sensitivity (maximum depth): approximately 18 cm. Operates with 2 x 9-volt batteries (not included).