The HF-SS is an intelligent horn strobe that alerts hearing impaired individuals to the alarm. The horn is programmed to emit a louder sound than the ambient noise in the building. This ensures that buildings with loud machinery can properly hear the horns. Each point (device) can be given a specific ID assigned when the panel enters a fire alarm condition, which allows the panel to give an audible and visual signal to the specific location.

HF-SS horn strobes are low-current, high-decibel notification appliances for use in fire signalling applications.