Intelligent Coil Detection: The built-in intelligent induction coil can immediately and accurately detect metal substances and automatically adjust the detection distance according to different objects. Equipped with two alarms: red LED indicator and sound alarm. 180 Degree Foldable: Metal detector with 180 foldable head, flexible for use in different scenarios, meeting different needs. Durable and resistant: the metal detector adopts smart power-saving technology, which provides long-lasting use after charging. Portable Design: Portable underground metal detector with simple operation, can be used for security public at airports, train stations, docks, prisons, customs, etc.