The CP450SER is a conventional, combined sounder + beacon unit in red, built for external / harsh environments (weatherproof). It is designed for use with 24 V DC systems, and fully compliant with EN54 standards. It features a polycarbonate Fresnel lens, selectable tones, adjustable volume, and synchronization capability. The device is rated IP65 for protection against dust and water ingress. Key Features: High sound output (≈ 103 dBA @ 1 m) — loud and clear alert for occupants in noisy or large areas; Weatherproof / IP65 rated — suitable for outdoor or exposed installations, resistant to dust / water ingress; 4 selectable tones — allows the installer to choose a tone appropriate to the environment or local regulation; Adjustable volume control — tuning sound level to the application need without replacing device; Voltage range: 20-28 V DC — supports nominal 24 V systems with tolerance margin; Automatic sounder synchronization — multiple units sounding in sync, avoiding chaotic alarms; Polycarbonate Freznel lens — durable lens for visual beacon, optimized light dispersion; Low current consumption — effective alerting without overly burdening the circuit. Industrial Uses / Applications: Exterior walls of buildings (facades); Car parks, exterior walkways, open corridors; Factory / warehouse exteriors; Building perimeters, pump rooms; Any location requiring both audible & visual alarm in harsh environments.