The 3V Active Buzzer is a self-driven audio alarm device that produces a steady tone when powered. It includes an internal oscillator circuit, requiring no PWM signal, and is ideal for low-voltage applications. Features Self-driven internal oscillation circuit Compact 9 mm diameter design Simple 2-pin operation (VCC, GND) Reliable and consistent tone output Low current consumption Applications Warning alarms Battery level indicators IoT devices with sound output Home appliances and automation