Key components:

• Sounder: Emits a high-decibel alarm sound to attract attention.  
• Strobe light: Provides a flashing visual signal, especially beneficial for those with hearing impairments.
• Power supply: Typically connected to the building's electrical system with a backup battery.
• Installation: Mounted in strategic locations throughout the building for maximum visibility.

Importance:

Sounder strobes significantly enhance the effectiveness of fire alarm systems by providing a multi-sensory alert. They are essential for ensuring the safety of building occupants, especially in situations where visibility is compromised by smoke.