Active Buzzer Alarm Module Sensor Beep Audio Control Panel for Arduino

1 module driven by S8550 triode

2 working voltage of 3.3 V to 5 V
3 sets of fixed bolt hole, convenient installation
4 small board PCB size: 3.3 cm X 1.3 cm

2 Module interface specification (3 wire system)
1 VCC external 3.3 V to 5 V voltage (which can be directly connected to 5 V microcontroller and 3.3 V microcontroller)
2 GND external GND
3 I/O external microcontroller IO port