Active Buzzer Alarm Module Sensor Beep Audio Piezoelectric for Arduino

Low level trigger ( low active ) Module description: - module driven by S8550 triode - working voltage of 3.3 V to 5 V - sets of fixed bolt hole, convenient installation - small board PCB size: 3.3 cm X 1.3 cm 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