Buzzer (passive) LS-3040TA-100

Key Specifications Type: Passive Piezoelectric (requires an AC/PWM frequency signal from a microcontroller like Arduino to make sound). Diameter: 30 mm (Standard 3040 size). Body Thickness: 5 mm. Mounting Structure: Features "ears" (flanges) with a 35 mm mounting hole distance for easy screw installation. Operating Voltage: Wide range, typically DC/AC 1V to 30V. Resonant Frequency: 4000 ± 500 Hz (produces its loudest sound near this range). Sound Output: Approximately 80 dB. Connection Type: Pre-wired with roughly 13 cm (5.1 inches) leads