DC 3V smoke detector for home 

Product Description Domestic Smoke Alarm for home •10 years life time •1 non-replaceable 3V lithium battery • Photoelectric chamber of early detection from all directions. • Loud>85db(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 •N.W.: ≈98g（include battery） • Dimensions: Ф100*35mm  Product Parameter power smoke alarms Model No. LZ-1922 Standard EN14604:2005/AC:2008…