G19411B - (Pkg 5) Compact Miniature 1.5V-12VDC Piezo Tone Alert
Self contained miniature SMD mounting tone alert has built in electronic driver to cause a penetrating tone to be produced when 1.5V up to 12VDC is applied. No driver or other electronic parts needed. Size only 0.67" square x 0.29" high. Has 2 metal tabs for surface mount connections or you can just solder leads to the tabs. Retails for about $5.00 each. Sold in a package of 5.