Sound Devices, Buzzers and Indicators, CT-1212CL-SMT-TR, CUI Devices

 CUI Devices CT-1212CL-SMT-TR in Reel. CT Series 2.4 kHz 5 V 12.8 x 12.8 x 7.1 mm SMT Magnetic Buzzer Indicator.

https://www.futureelectronics.com/p/passives--sound-devices--buzzers/ct-1212cl-smt-tr-cui-devices-7039988