Active Buzzer Module Description:

Driven by 9012 triode
Fixed bolt holes for easy installation
Small size: 3.3cm * 1.3cm PCB
Two module interface description (3 wire system)
Working voltage: 3.3V-5V
VCC: External 3.3V-5V voltage (can be directly connected to 5V microcontroller or 3.3V microcontroller)
GND: External Ground
I/O: External chip IO port
Features of Active Buzzer:

Has a built-in sound source
Convenient program control
Can produce sound with a high or low level of MCU
Voice frequency is controllable
Differences from Passive Buzzer:

Does not require an oscillating electronic signal
Can produce sound as soon as it is electrified
Cannot be controlled by a passive buzzer.