ALWAYS PROTECTED: be alerted to any outbreak of fire with this Smartwares 10.044.62 smoke detector. We recommend installing one on each floor, or one in every room between 20 and 40 m². EU CERTIFIED: this smoke detector meets all European safety standards (EN14604). If you have a large house and need to install several smoke detectors, take a look at our smoke detector packages. PHOTOELECTRIC SENSOR: this Smartwares smoke detector features an optical sensor for early warning, even of smoldering fires. False alarms are reduced. The sensor has a life of 10 years, so you'll need to replace your detector after that amount of time. REPLACEABLE BATTERY INCLUDED: this smoke detector is powered by a replaceable 6F22 battery, with a life of 1 year. Test its operation regularly by pressing the test button. LOW BATTERY WARNINGS AND SILENCE BUTTON: in the event of a fire, an 85 dB siren sounds. The detectors also warn you when the batteries are low and need replacing. The test/silence button silences your detectors in the event of a false alarm., Weight: 0.2976240537 Pounds, Manufacturer: Smartwares