The buzzer is a device that converts an audio signal into a boosted signal and is commonly used in household appliances, banks, public security alarm systems, electronic toys and game consoles. 

The buzzer is mainly used for alerting or alarming, depending on the design and use, it can emit music, siren, beep, alarm, etc. Depending on the design and application, they can produce a variety of sounds such as music, sirens, beeps, alarms and electric bells. The buzzers used in washing machines mostly emit a beeping sound to alert the user to the operation process. Buzzers used in gas appliances mostly sound an alarm to warn the user that the appliance is burning dry. Buzzers used as doorbells mostly emit a "ding-dong" sound or a musical sound to indicate a visitor. Buzzers installed in public security, banks and home security areas emit an alarm sound. If someone enters the security area, the buzzer will sound an alarm under sensing control. Buzzers used in factories and schools mostly sound an electric bell. Depending on the type of buzzer, its working power supply is also different, some are connected to DC such as the electric horn used in cars, etc.
 
Rated voltage: 12V 
Voltage range: 3~24V
Rated current: 12mA at 12VDC
Sound pressure and frequency: 100dB at 12VDC
Resonant frequency:3.0+0.5KHZ
Operating temperature:-20+45℃ 
Storage temperature:-20+60°C