High Sensitive Metal Detector The metal detector allows you to quickly scan a large area, then use precise positioning guidance to zoom out and find the target before digging. The bar probe design allows you to insert a handheld metal detector into the hole for inspection. Easy Operation One touch, when metal objects are detected, the LED indicator will light up. At the same time, the sound and vibration of "Bi-Bi" will sound like an alarm. The alarm intensity increases as the detector approaches a metal target. This unique feature helps the user determine the exact location of the target. Lightweight It is one third of the weight of traditional metal detectors. Comes with two 9V batteries, a plastic elastic strap, a belt sheath and a carrying bag for easy carrying or hanging to prevent dropping or loss. A button opens for independent operation by the child. Partially Waterproof The dustproof metal detector needle is partially waterproof. You can submerge this part and check if there are any metal parts in the water. But it can't be used in water, the switches and horns are not waterproof. WIDE APPLICATIONS This metal detector needle can do all types of work such as searching for coins, gold, silver, artifacts, jewelry, helping you Easily find treasures or lost metal objects whether indoors or outdoors, walls, sand, grass or floor, even in extreme temperatures ranging from -35F (-37C) to 158F.