Honeywell Silent Knight SpectrAlert Sounder

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Honeywell Silent Knight’s SpectrAlert Advance low-frequency sounders and sounder bases are designed by System Sensor to emit a 520 Hz tone, which studies have found more effective at waking building occupants, including those with hearing loss. These notification appliances provide the low-frequency output to meet current NFPA 72 standards. Users can upgrade existing installations by replacing the base.