The buzzer vibrates through the multivibrator and emits audio signals. GOOD PERFORMANCE: This sound buzzer is mainly composed of a multivibrator, a piezoelectric buzzer chip, an impedance matching unit, resonator, and enclosure, which provide stable performance and durability. MAIN FUNCTION: This buzzer can be connected to a rated power source and will continue to sound. It can be easily controlled. IMPEDANCE ADAPTER: The 12V buzzer is designed with an impedance adapter to drive the sound of the piezoelectric buzzer. Important Parameters: It is a piezoelectric buzzer, sound type is continuous, volume is 110 decibels, working voltage is DC 3-24V. The cable length is 120 mm. Buzzer is an electronic component with integrated structure. The use of direct current makes it widely applicable in computers, printers, photocopiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, and other electronic products.