First I ordered a set of 3 and only 2 worked. The other two seem to work fine but both are noisy. It's not very loud, so if you're using it for a large gathering at a buffet table, it might not be noticeable. However, I wanted to use them for our outdoor family dinners, which we make almost every night. They're loud enough to be annoying. I haven't tried them to see if they really hold back errors.
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