http://www.amazon.com/Etekcity-Ba…e+detector
[LIST][*]Intelligent: Photoelectric sensor providing timely detection of slowly smoldering flames that go easily unnoticed[*]Reliable: Boasts a lifetime of up to 10 years of protectioneven during power outages; Includes safe and convenient low battery sound indication[*]Alert Control: 85 dB alarm for audible emergency prevention. Press the test button to silence false alarms triggered by non-hazardous elements