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Simplex 4901-9820 TrueAlert Non-Addressable Electronic Horn
The Simplex 4901-9820 TrueAlert Non-Addressable Electronic Horn can be controlled either directly from a standard NAC (free-run operation mode) or by the Simplex SmartSynch two-wire operation mode.Rated Voltage Range: 16 VDC to 33 VDC.
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