This First Alert Cable Network Photoelectric Smoke Detector Temperature Compound uses ionization sensing technology. Every house￡? apartment￡? business has a smoke detector￡? our Smoke detector systems is a perfect solution if wired is not the solution that you are looking for. we also stock wireless versions of the same high quality item.                                    Features            A battery powered photoelectric type smoke detector reduce nuisance alarms from cooking smoke and shower steamSpecial moisture-proof designWith manual testing￡? auto resetEasy to install￡? stable and reliable performanceRed LED indicator alarm￡? strong adaptability to environmentUnique structural design￡? dust￡? pest control￡? anti-interference from outside lightAlert and warn people stay far away from danger field when it detected smoke                                                            Specifications            Operating voltage    DC 12V (network type)￡?9V battery(independence or wireless type)<br>    <br>Static current    ?ü200uA (network type )￡? ?ü10uA (independence or wireless type)    <br>Alarm current    ?ü20mA    <br>Alarm indication    Red LED flash    <br>Soundlevel    ?Y85dB/m(independence or wireless type)    <br>Weight:    158g /5.57oz<br>    <br>Dimensions:    (4.5 x 10)cm / (1.77 x 3.94)" (H x Dia)<br>    <br>                                                            Package Includes            1 x First Alert Cable Network Photoelectric Smoke Detector Temperature Compound1 x User Manual                                                            Extra Info            Note:1. If your detector runs on batteries￡? change them when you change your clocks - at the start and end of daylight-saving time2. If your smoke detector starts chirping or beeping off and on￡? it&acute;s time to change the batteries3. You may want to consider purchasing a combination smoke / carbon monoxide detector. These units cost more but are well worth it4. 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&acute;s home5. Avoid getting any paint or dust on your smoke detector6. Make sure the smoke detector you choose has been tested by an independent testing laboratory7. Replace all detectors after 10 years