The buzzer cannot be used as a mineral radio, because there is an oscillation circuit inside the buzzer. When the power is turned on, it will drive a miniature horn inside to emit a beep. The buzzer is not a simple trumpet.
This product would be ideal for applications requiring a compact and efficient Active Electronic Buzzer Sounder, providing adjustable 3V, 5V, or 9-12V signals, and with 55mm long wires.
