Product description
Type: Active Piezo Buzzer
Model: SFD-2312
Size: 23x12mm
Working Voltage: DC 3-24V
Vocal Tract: Single
Material: ABS, Metal
Color: Black

Easy to install, there are 2 mounting holes for screw fastening, 2-wire pigtails for easy connecting. 
Widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephone, timer and other electronic products as a sound device.