3.3-5V Active Low Level Trigger Buzzer Alarm Module Sensor Beep

Product details of 3.3-5V Active Low Level Trigger Buzzer Alarm Module Sensor Beep
Passive Buzzer produces sound of a wide range of frequencies. A passive buzzer does not have a built-in oscillator, so it needs an AC audio signal to produce sound. We can use the PWM (Pulse Width Modulation) in the MCU instead of the AC signal. The sound Frequencies changes based on the input signal frequency to the buzzer.

Specification of 3.3-5V Active Low Level Trigger Buzzer Alarm Module Sensor Beep
Passive Buzzer: 10mm
PCB dimensions: 34.28 mm (L) * 13.29 mm (W) * 11.5 mm (H)
Work Voltage: 3.3-5V 
Pin definition
Vcc: 3.3~5VDC
GND: the Ground
I/O: I/O interface of SCM