Technical data: Types of detected threats: smoke Low battery indication: yes Alarm volume level (dB): 85 TEST button: yes Alarm mute: no Fault indication: no End of service life indication: no Dimensions - width: 107mm Sensor lifespan: 10 years Dimensions - height: 35mm Sensor type: photoelectric Type of device equipped with a battery: Device The product requires a battery: yes Built-in battery: no Battery included with the product: yes Battery type: 6F22 Number of batteries: 1 The sensor is designed to monitor enclosed spaces for the presence of smoke and for early fire detection. The photoelectric sensor detects visible smoke produced in the flameless, early stages of a fire. Visual and audible notifications are provided. The TEST button allows you to check the sensor's operation. Low battery indication is provided. Compliance with EN 14604: 2005 + AC1: 2008 is confirmed by the BSI-KM550646 certification body. ** Illustrative photos.