3V Buzzer / Mini Speaker - PC Mount TMB12A03

This is a small 12mm round speaker that operates around the audible range. You can use these speakers to create simple music or user interfaces. Inside is a piezo plus the driver circuitry that makes it oscillate at 2KHz. On one hand, that makes it really great for integrating into projects because you don't need an oscillating control signal.

Specifications:

Sound Pressure Level: >82db

Resonant Frequency: 2,300± 500Hz 

Rated Voltage: 3V

Operating Voltage: 2.5V~4V

Rated Current: <35mA

Operating Temperature Range: -20°C to +60 °C

Storage Temperature Range: -20°C to +70 °C

Dimensions (not including pins): 12mm diameter, 9.7mm tall

Pins: 6mm long and 0.3" apart

Datasheet