This is a small 12mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces. This is not a true piezoelectric speaker but behaves similarly. Instead of a piezoelectric crystal that vibrates with an electric current, this tiny speaker uses an electromagnet to drive a thin metal sheet. That means you need to use some form of alternating current to get sound. The good news is that this speaker is tuned to respond best with a square wave (e.g. from a microcontroller). https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2008-04-21 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2008-09-23 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2008-10-18 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2016-11-26 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2016-11-28 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2016-11-30 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2016-12-09 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2016-12-13 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2017-11-24 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2017-11-28 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2018-05-05 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2018-11-21 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2018-11-27 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2022-02-22 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2025-04-12 https://elecena.pl/product/633795/mini-speaker-pc-mount-12mm-2-048khz 2025-04-14