The **Apollo Discovery Open-Area Voice Alarm Devices** provide clear voice messages, alarm tones, and optional visual indication for reliable emergency notification in commercial, residential, and industrial fire alarm systems.

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 Addressable XPERT 7 Base 45681-210** provides secure detector mounting, organized loop wiring, and accurate address configuration for compatible Apollo fire detection systems. Its XPERT addressing technology helps simplify detector replacement, reduce addressing errors, and support reliable fire alarm monitoring in commercial, residential, institutional, and industrial buildings.

Explore the Simplex 4098-5601 Smoke Detector and 4098-9774 TrueAlarm Photoelectric Sensor, designed to support reliable smoke detection, intelligent monitoring, accurate alarm identification, and easier fire alarm system maintenance for commercial and industrial applications.

The Simplex 4099-9004 Single-Action Addressable Manual Pull Station provides fast and reliable manual fire alarm activation for commercial, institutional, and industrial buildings. It features a clear pull-down mechanism, individual device addressing, and compatibility with Simplex IDNet and MAPNET II fire alarm systems.