[Adjustable Alarm Threshold]: By rotating the potentiometer, the alarm threshold can be adjusted according to your needs to make the device more sensitive and meet different detection needs. [DIY Welding Exercise]: Metal detector DIY kit, you need to weld and assemble it by yourself, providing an engaging way to learn about electronics and circuit board assembly. It can not only exercise hands-on ability, but also improve electronic production skills, suitable for electronic enthusiasts and students. [Portable Design]: The metal detector is compact, , and easy to carry, suitable for use in various environments, such as games and entertainment, safety checks, and so on. [Dual Alarm System]: When the detector is close to the metal, the buzzer and LED light alarm at the same time, providing both visual and auditory prompts for more accurate and convenient detection. [Learn Knowledge & Cultivate Thinking]: By assembling and using the metal detector by yourself, you can cultivate interest in electronic and physical knowledge and stimulate innovative thinking. Perfect for beginners looking to explore the fundamentals of electronic and circuit design., Weight: 0.11464037624 pounds, Manufacturer: ISKDJBJG