- Function and learning: The device detects surrounding metal objects and demonstrates the basic principles of metal-detection circuits, helping users understand how coils and signals interact in practice. - Kit contents: Includes a simple metal detector kit designed for beginner assembly. - Size and build: Compact handheld unit built with common electronics components for portability and ease of use. - Performance: Detection range about 3-5 cm for small metal items; larger metal surfaces increase detectable distance. - Uses and practicality: Ideal for education and hobby electronics, gaming or scavenger hunts, and basic security screening practice or locating lost metal items. - Compatibility and value: Works with entry level electronics projects and classroom demonstrations; affordable, reliable introduction to metal detection.