Buzzer 3-24VDC (45MM ) (Passive)

Features:

Piezoelectric buzzer pkm44ew is mainly made up by multivibrator, piezoelectric buzzer chip, impedance matching unit,resonator and shell. Multivibrator is composed of transistors or integrated circuits. When switched on, multivibrator vibrates and outputs audio signal. Impedance matcher drives piezoelectric buzzer sound. Applying a 5V pulse from your Arduino will generate a pleasant audible signal of around 2,300hz at approximately 95dB.

Specifications:

Color: Black

Diameter: 45mm

Cable Length: 50mm

Sound Pressure Level: 85 to 95 decibels

Weight: 5g(approx.)