Usage Tips:Buzzer 12v Electronic 110db, 3-24v Active Piezo Buzzer Tone Continuous Buzzer Alarm Sound 120mm Length Buzzer (1pc)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, a impedance matching unit, resonator and enclosure, which have stable performance and durability. MAIN FUNCTION: This buzzer can be connected to rated power source and the buzzer will continue to sound. 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 sound, volume is 110 decibels, working voltage is DC 3-24V. The cable length is 120 mm. Buzzer is an electronic probe with integration structure. The use of direct current is widely used in computers, printers, photocopiers, alarms, electronic toys, automotive electronic equipment, telephones, timers and other electronic products.