25cm High-Precision Metal Detector with Adjustable Height, Batteries Not Included, Waterproof Search Coil for Professional Metal Detector, Suitable for Children and Adults

Two operating modes: all-metal mode, identification mode. Volume control: Adjust the volume of the speakers and headphones. Headphone port: Can be connected to headphones (not included). Pointer display: The pointer oscillates when metal is found. Waterproof search coil: The metal detector can be used in shallow water. Adjustable shaft: Adjust the length of the metal detector. Specifications: Power supply: 2 x 9V (6F22) (batteries not included). Frequency: 5.0 kHz. Current: Static: 10 mA. Maximum: 70 mA. Voltage: 7.2-9.6 V. Sensitivity: 130 mm. Display mode: Mechanical pointer mode, audible mode. Telescopic length: 30.7-42.1 inches. Search coil diameter: 6.5 inches. Various types of metals can be identified, including coins, artifacts, jewelry, gold, copper, silver, etc. It can protect against certain low-grade metals that you don't want to detect and distinguish the high-grade metals you do. Perfect for adventures at the beach, in the garden, in the forest, in meadows, or in the mountains, as well as for underwater exploration in search of treasure in rivers or oceans. When a metal is detected, the device beeps to alert you to its presence. The closer the coil is to the target metal, the stronger the signal on the instrument and the further to the right the needle will move.