Product details:

Explore the world of metal detection and electromagnetism. Detector is length adjustable. The telescoping arm extends out to 40-inches long to fit different sized kids. Detection sensitivity and the alert volume are also adjustable. The entire unit is lightweight at 1.5 lbs (0.7 kg) Dual detection coil is position adjustable and waterproof, allowing users to submerge the coil to look for treasure in shallow water. Powered by 3 AAA batteries, which are not included.