Selectable Output Strobes, Horns, and Horn ... - System Sensor
The 2-wire products fit systems where a single NAC controls both horn and strobe. The 4-wire products are in - tended for systems which have separate wiring circuits for the horn and strobe. All SpectrAlert Advance products are suitable for use in synchronized systems. The System Sensor MDL3 module may be used to provide synchronization.
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