This buzzer is great from many projects that need ... beeps. It is an AC buzzer which mean you need to drive it with an AC signal (ie. PWM). It is good for 4-8 VACpp with maximum sound of 85dB at 2.4 KHz resonant frequency. It is lound enough to use as an audio alert. For some reason we don't know why the Mfg spec below say VDC, but for sure this is an AC buzzer.
||4VDC - 8VDC
||85 dB min.
||-40 ~+85degree C
* Applying rated voltage (square wave, 1/2 duty, resonant frequency)
** Distance at 10 cm (applying rated voltage: 2,700 Hz, 1/2 duty, square wave)
*** Applying resonant frequency, sine wave, measuring current 60mA