Battery-operated Smoke Detector 9v

technical data:types of detected threats: smokelow battery indication: yesalarm volume level (db): 85test button: yesalarm mute: nofault indication: noend of service life indication: nodimensions - width: 107mmsensor life: 10 yearsdimensions - height: 35mmsensor type: photoelectrictype of device equipped with a battery: devicethe product requires a battery: yesbuilt-in battery: nobattery included with the product: yesbattery type: 6f22number of batteries: 1the sensor is a device designed to monitor closed rooms for the presence of smoke and for early fire detection. The photoelectric sensor detects visible smoke produced in the flameless initial stage of a fire. Visual and audible notification. The test button allows you to check the sensor's correct operation. Low battery indication. Compliance with the en 14604: 2005 + ac1: 2008 standard confirmed by the bsi-km550646 certification body.**illustrative photos.