The world's smallest battery-operated smoke detector for monitoring rooms for smoke and fire early detection. The photoelectric sensor detects visible smoke in the flame-free, initial stage of a fire. Visual and acoustic alerts inform about the status. The test button allows you to check the sensor's functionality, while the hush button enables silencing the alarm. The smoke detector is designed for low installation and has an extremely durable construction. It complies with the standard EN 14604: 2005 + AC1: 2008 and is approved by the certification body BSI-KM514007. An acoustic signal indicates that the sensor has ended. Dimensions: 45 × 42 mm (diameter / height).