You can use this portable metal detector to detect the presence of small metal objects. This metal detector is a great help in the process of searching for offensive objects in crowd control, airport and border security, package inspection for metal objects and anywhere you need metal hidden for detection. Also used to search for coins, artifacts, jewelry, gold and silver, it can alert you to the presence of metal objects and notify you of its location with sound and vibration alerts. Detect metal objects at airports, train stations, docks, customs and border guards for security checks. Provides precise metal security detection with adjustable sensitivity. Tri-color indicator light, green light for power, yellow light for low battery, red light for metal detection alarm. Easy to use with 2 alternative alarm paths indicated by an audio signal indicator and buzzer. Portable, lightweight and easy to carry with a wrist strap. Rechargeable battery socket for charging the product when a rechargeable battery is installed.