10 years life time |
1 non-replaceable 3V lithium battery |
Photoelectric chamber of early detection from all directions |
Loud>85 db(A) alarm signal ( 3M) |
Big test button for easy operation |
Hush function |
Low Battery signal |
Automatic calibration instead of adjustable resistor |
Infra-red LED and more sensitive photo-diode |
End of life indicator |
Contents list: Smoke detector X 1, Manual X 1, Battery X 1, Screws X 2, Plugs X2 |