Functions
1. Alarm function: When the smoke concentration reaches the preset limit, the device will continuously give sound of "di-di-di" and the indication light keep flashing in every 3 seconds. If the smoke concentration comes below the limit, it will resume to the normal working status.
2. Noise Muting function: When the device give audible and visual alarm, press the button, the device will become silent, only the indication light keep flashing. However, if the smoke concentration keeps always higher than the limit, the device shall give sound alarm again in 60 seconds after you press the button.
3. Self -check function: Press the button, the device will give the sound of "di-di-di" and the indication light keep flashing, this is to indicate you that the device works properly.
4. Low voltage reminding function: When the battery voltage is lower than 2.7V, the device shall give sound of "di-di-di-" in every 30 seconds, this is to remind you to replace the battery.
5. Normal working-condition reminding function: When the device in the normal working status, the indication light will give a short flash in every 300 seconds, this is to remind you that the device is in the working condition.
6. Failure warning function: If the device in fault condition, the device shall give sound of "di-di- " in every 30 seconds and the yellow indication light start flashing.

Humidity: ≤95%, No Condensation