Buzzer speaker

In a buzzer speaker, current is run through a coil of wire that produces a magnetic field. The flexible ferromagnetic disc is attracted to the coil when current is flowing through it and returns to a "rest" position when current is not flowing through the coil. The sound from the buzzer speaker is produced by moving a ferromagnetic disc in a similar way to a cone in a speaker.

* Voltage: 5V * Pin distance: 7mm * Dimensions: height: 16 mm / 0.6"; diameter: 12 mm / 0.5"