Unfortunately, not all newer smoke/co alarm models adhere to these signals and there are some alarms that are currently not supported. You can learn more about the sounds here: What kinds of smoke and carbon monoxide alarms are compatible with the Leeo Smart Alert?
Known unsupported alarms:
|Universal Security Instruments||USI-1204|
|Universal Security Instruments||USI-5204|
User Reported unsupported alarms:
|Home Depot||Code One|
|SafetySiren Pro Series||HS80504|
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