VEVOR Waterproof Metal Detector, 12" Coil, Professional Rechargeable Gold Detector, 39-50 in Adjustable with LCD 7 Modes Advanced DSP Chip Bluetooth Headset, IP68 for Detecting Gold Treasure Hunting

It can stay underwater for about four hours.

All products on our official website come with a 12-month warranty. If you purchase a product that has a problem within one year, we will be responsible for you. Here is the link: https://www.vevor.com/pages/return-policy.

There are many factors that affect detection depth. For example, detector sensitivity adjustment. The soil moisture and density in different areas, the magnetic field in different areas, the size of the metal area, the time the metal has been buried underground, the longer the time, the larger the surrounding area that is assimilated by the metal, etc. These will affect the detection depth.

Each detector is equipped with only one coil. Different models of detectors may have different coil sizes. The type of metal detected has nothing to do with the coil size. The coil size is related to the signal strength.

Hello, as long as it is metal, it can be detected, even gold nuggets can be detected, and the detection depth is determined by the size of the area.