Features:Achieving small-scale precise positioning that large metal detectors can't do.Upgraded version of ultra-high stability and sensitivity probe for fast positioning.Buzzing/ vibrating/ buzzing vibrating 3 alarm modes switchable.10cm 8 inch scale ruler on the detector, more convenient to use.IP68 fully waterproof design, can be used underwater up to 32.8ft (10m) deep.With LED indicator light to assist in dark and low light conditions.The detector will be turned off automatically if there's no operation in 10 minutes.Powered by 1 * 9V battery, get rid of cable annoyance, flexible to use.Small in size and light in weight, super portable to carry around.