The **Apollo Discovery Open-Area Sounder Visual Indicator** combines audible and flashing visual alarm notification in one compact addressable device. Available in red and white models, it is suitable for commercial, healthcare, educational, residential, and industrial fire alarm applications.

The **Apollo Discovery Category O Sounder VAD Base with Isolator 45681-700** combines audible alarm notification, white-flash visual warning, detector mounting, and short-circuit isolation in one compact addressable device. Suitable for commercial, healthcare, educational, residential, and industrial applications, it helps improve occupant notification, protect the fire alarm loop, and support a cleaner installation.

The **Apollo Discovery Optical/Heat Multisensor Detector 58000-700** combines optical smoke and thermistor heat sensing to support reliable early fire detection, flexible operating modes, accurate device identification, and improved false alarm management in commercial, residential, healthcare, hospitality, and industrial buildings.

The Apollo Discovery Optical Smoke Detector 58000-600APO provides intelligent addressable smoke detection for offices, hotels, hospitals, schools, warehouses, and commercial buildings. Featuring optical light-scattering technology, five selectable operating modes, and automatic drift compensation, it helps deliver reliable early warning and improved fire alarm system performance.