This is a small 15mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces. This through-hole speaker is great for projects where you don't have room for a full-blown speaker. This 15mm diameter speaker is encased in plastic and will handle up to 0.5W of power. https://elecena.pl/product/21485917/through-hole-speaker 2022-08-19 https://elecena.pl/product/21485917/through-hole-speaker 2025-06-07