two out of three is not 100% functional

two out of three is not 100% functional

Merten smoke detectors 547 090 3-Pack (tool)
Buy at Amazon.com

Customer Review

Since the test function does not work, we had to complain about a three-pack.
In two out of three smoke alarms, the acoustic signal switched from the test do not, but was permanent. Only by removing the battery beep could be parked.

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