Bosch SS-HR-LF 520Hz Horn, Wall/Ceiling Mount, Red

Designed for dependable life-safety performance, the Bosch SS-HR-LF 520Hz horn delivers clear, code-compliant audible alerts for fire alarm and security systems. As a Bosch horn engineered for wall or ceiling mounting, it meets NFPA 72 sleeping-area requirements with a 520 Hz square-wave tone that improves occupant response. Installers benefit from the plug-in design and minimal intrusion into the back box, cutting installation time and lowering labor costs on new builds and retrofits. The integral rotary switch lets you choose temporal three, continuous, or coded sound patterns to match your monitoring, fire alarm, or building management logic. Powered by standard 24V DC and compatible with the SS-MDL3R synchronization module, the SS-HR-LF integrates smoothly into larger security, surveillance, and notification architectures. The red housing provides clear visual identification in commercial, healthcare, hospitality, and campus applications. Specify the Bosch SS-HR-LF horn to simplify compliance and installation — contact your supplier or add it to your next fire alarm or security monitoring project.

• Ensures NFPA 72 compliance for sleeping areas, giving you reliable audible alerts where they matter most
• Selectable temporal-3, continuous or coded tones via rotary switch for easy integration with existing alarm logic
• 520 Hz square-wave tone optimized for audibility and occupant response in life-safety events
• Plug-in design and minimal back-box intrusion speed up installation and reduce labor on retrofit or new builds
• Wall or ceiling mount flexibility and SS-MDL3R synchronization compatibility simplify inventory and system design