Smartwares Interconnectable Smoke Detector 2-Set - Pair up to 24 detectors together - 5-year battery - Optical sensor - Illuminated indicator - Test button - Silent function - FSM-11652

To react quickly in the event of a fire, pair up to 24 smoke detectors together with Smartwares and the set of two FSM-11652 detectors. The interconnected detectors will all go off as soon as one of them detects an outbreak of fire. Those smoke detectors are powered each by a CR123A battery with a 5-year life. So you'll only need to replace them once during the lifetime of your detectors. An indicator light shows you the status of your detectors: normal operation, malfunction, end of life... But make sure you test them regularly to make sure they are working properly. The detectors have highly sensitive photoelectric sensors. Therefore, they will talert you quickly in the event of a fire, even a smouldering one. If necessary, you can press the test/silent button to switch off the siren while you neutralise the source of smoke. Mounting hardware (screws and dowels) is included. We recommend installing at least one smoke detector per floor. Choose their location carefully., Weight: 0.16975594174 pounds, Manufacturer: Smartwares