PKLCS1212E4001-R1 Piezo buzzer / sounder by Murata. Download Murata Piezoelectric sounders .pdf datasheet: mounting type: surface mount. Max voltage : 25 Volts. Size: 12 x 12 x 3mm. Output: 75 Db continuous tone 4 KHz. Status: NS (New Stock) supplied on tape. requires external components to operate. RoHS compliant: YES