10Pcs Black KY-012 Buzzer Alarm Module For PC Printer
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Used these buzzers before as discrete components, but it was cheaper (and more convenient) to buy these modules. In case it's not clear, this is a fixed-frequency piezo buzzer at about 4kHz; in other words it's either on or off. Sound level is about 80dBA and the current draw is around 7mA Outer 2 pins only connected, it's a polarised device so ground pin is '-' and put a positive voltage on 'S' (3.3 or 5v, though the module will take up to 16v).
ok
good price
I ordered Keyes buzzer as specified on the ad but received No name Brand but on the package, it's write Geekcreit.
These buzzers keeps chirping, I spent an entire evening trying to understand why, but at some point after trying a few of them I came to realize they ar not up to their price...