Alarm: when the detected smoke concentration exceeds, Red LED will
flash quickly and the buzzer will give out quick “Di-Di-Di” alarm
sounds.
Hush:
when the smoke alarm is alarming, press the hush button, the device will
enter hush mode for about 10 minutes; if in low battery warning status,
press the hush button, the device will enter hush mode for about 12
hours.
Low
Battery: When the battery power becomes low, the red LED will flash once
and the smoke alarm will issue “Di” warning sound once every 53
seconds.