This piezoelectric buzzer is an electronic sound component used with
such electronic products as electronic thermometers, computers, music
cards, telephones, and watches. Also used as a transducer for
sound-control electronic products.

Specifications:
1) Rated voltage: 12VDC
2) Operating voltage: 6 - 28VDC
3) Max. current consumption: 20mA
4) Min. sound output at 30cm: 90dB
5) Resonant frequency: 2900 ? 500 Hz
6) Working temperature: -20 ~ 70
7) Weight: 35g

Features:
1) Reflow capable
2) Low current consumption and good matching impedance for voltage drive