Can extend up to 10 / 20 speaker control circuits.
Floor interlocked fire response can be designated by the panel keys.
Fitted with service partition selection function.
Each set of speaker circuit are fitted with are dual-color LED lights, so that the circuit interlocks and other corresponding information (such as malfunctions) can be displayed.
Each set of speaker circuit panels are left with a space to label the speaker circuit's name or code.
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