Sounder Bases

Designed to meet NFPA low-frequency signaling requirements for unattended sleeping areas.

Designed to meet NFPA's low-frequency signaling requirements for unattended sleeping areas, the Autocall TrueAlarm 520Hz Sounder Base is the ultimate choice for hospitality, education, and multi-occupancy residential settings. It offers a cost-effective solution to bring existing Autocall systems into NFPA compliance with minimal disruption.

Key Features:

Generates 520Hz and broadband tones.
Contemporary, sleek, shallow, and asymmetrical design that seamlessly integrates with the surroundings.
Available both with and without integrated CO sensor.
Similar installation, configuration, and programming as other Autocall units.
Perfect for retrofitting: The 520Hz Sounder Base can replace existing Autocall sensor bases, allowing for reuse of both the current sensors and wiring, reducing costs and minimal disruption.
Compatible with Autocall 4100ES, 4010ES, and 4007ES control panels.

Sounder Bases

Key Features:

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