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 CO/Heat Multisensor Detector 58000-305** combines carbon monoxide and heat sensing to help detect smouldering and developing fires. Designed for analogue-addressable fire alarm systems, it supports flexible operating modes, accurate device identification, and dependable protection for hotels, hospitals, offices, warehouses, and other commercial facilities.

The **Apollo Discovery Heat Detector 58000-400** provides reliable analogue-addressable heat detection for commercial, industrial, and institutional applications. Designed for areas affected by dust, steam, fumes, or airborne particles, it supports accurate temperature monitoring, individual device identification, and dependable fire alarm system performance.