smoke & Heat alarm,smoke detector,fire detector 1) Low-sensitivity warning 2) Low-battery warning 3) Ten-year warranty smoke & heat alarm,smoke detector,heat detector,smoke alarm,fire detectorFeatures:1) Photoelectric sensing technology2) Temperature sensor rated at 135°F (57°C)2) Polished low-profile housing design 3) Battery case on the back of the detector for easy removal 4) SMD circuit board ...