The Body Temperature of The Smoke Detector combines photoelectric and ionization sensing technologies into one unit to offer broad detection against smoldering and flaming fires. Recommend that for optimal protection you have both types of sensing technology in your home. This provides further flexibility in aiming the detector. This smoke alarm's trademarked Hush feature allows you to silence nuisance alarms￡? while an indicator LED and test feature let you easily confirm that the alarm is working.                                    Features            A battery powered photoelectric type smoke detector reduce nuisance alarms from cooking smoke and shower steam<br>Special moisture-proof design<br>With manual testing￡? auto reset<br>Easy to install￡? stable and reliable performance<br>Unique structural design￡? dust￡? pest control￡? anti-interference from outside light<br> Alert and warn people stay far away from danger field when it detected smoke<br>                                                            Specifications            Operating voltage    9V battery    <br>Alarm current    ?ü20mA    <br>Alarm indication    Red LED flash    <br>Sound level    ?Y85 dB / m (independence or wireless type)    <br>Operating Temperature    -10 ??~ +50 ??    <br>                                                            Package Includes            1 x Body Temperature of The Smoke Detector<br>                                                            Extra Info            Note:If your detector runs on batteries￡? change them when you change your clocks - at the start and end of daylight-saving time<br>1. If your smoke detector starts chirping or beeping off and on￡? it's time to change the batteries<br>2. You may want to consider purchasing a combination smoke / carbon monoxide detector. These units cost more but are well worth it<br>3. If a smoke detector goes off￡? you literally have seconds to respond. There is ly no time to gather possessions￡? pets and possibly even each other. Your best response is to leave your home immediately￡? gather at your prearranged meeting place and call 911 from a neighbor's home<br>4. Avoid getting any paint or dust on your smoke detector<br>5. Make sure the smoke detector you choose has been tested by an independent testing laboratory<br>6. Replace all detectors after 10 years<br>