Features EASY DETECTION: This metal detector can easily detect metal objects up to 4 inch below the surface by simply sweeping it horizontally over the area. The closer the detector is to the metal object, the louder the sound and more strong the signal, which wi WATERPROOF AND PRECISE: The metal finder features a waterproof high precise coil that can also be used for shallow water detection, making it perfect for beachcombing and underwater. FOLDABLE AND ADJUSTABLE: The metal locator can be easily folded and adjusted in length according to the age and height of the user, making it suitable for people of all ages. SAFE AND LIGHTWEIGHT: The metal detector is designed to be compact and made of safe ABS plastic, making it perfect for children to use for extended periods of time. FUN AND EDUCATIONAL: Giving your child a metal detector will not only cultivate their exploration and curiosity, but also add fun to their daily life and encourage parents to get involved in their growth and development. Specification: Item Type: Metal Detector Material: ABS Detection Method: Vibration, sound, vibration and alarm Battery: 1 x 6F22 battery (shipped without battery) Signal Frequency: 3.1KHz±1KHz Sensitivity: US 25 Cent: 100-120mm Package List: 1 x Metal Detector 1 x User Manual 1 x Accessory Package List 1 x Metal Detector 1 x User Manual 1 x Accessory