説明
Piezo Buzzer / Sounder, Ningbo East Electronics EFM-290EDQ, 40mm Diameter, 20mm Hight Supplier Digikey: https://www.digikey.com/en/products/detail/east-electronics/EFM-290EDQ/12620012Datasheet: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/444/EFM-290EDQ.pdf