Fyreye MKII Addressable Optical Smoke Detector is a component of a fire alarm system. It uses an optical sensor to detect smoke particles in the air, which typically indicates the presence of a fire. The addressable feature means that each smoke detector has a unique address on the fire alarm system loop, allowing the control panel to identify the specific detector that has been triggered.

Fyreye MKII Common Base FEII-CB is a common mounting base that is used to connect the addressable optical smoke detector to the wiring of the fire alarm system. It provides a secure and stable connection between the detector and the wiring, ensuring reliable communication between the detector and the control panel.