Active buzzer module

Model: KY-012.
Active buzzer module.
When this sensor is powered, this active buzzer generates a sound with the frequency of 2.5 kHz. The active buzzer module, unlike the passive buzzers does not require a square wave voltage to generate a tone. If a voltage of min. 3.3 V is applied to its signal pin, the required square wave voltage is generated by the buzzer itself.
Specifications:
Operating voltage: 3,3 V - 5 V.
Maximum current: 30 mA.
Tone frequency 2,5kHz ± 300 Hz.
Minimum sound output: 85 dB.
Operating temperature: -20 °C - 70 °C.
Storage temperature: -30 °C - 105 °C.
Dimensions: 19 x 15,5 x 11 mm.