Elevator Pit Auxiliary Intercom NKT12 NBT12(1-1)B1
$6.50
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Serie Connection Wire Cabin Inner Intercom NBT 4 Wires Cabin Inner Intercom NKT 6 Wires External Intercom NBT 2 Wires External Intercom NKT 4 Wires NBT Serie is for two-wire system, and NKT Serie is for four-wire system. NBT serie intercom products are not compatible for NKT serie. The NKT serie (four-wire system) products need to be connected to electrical wires, and the signal is better.
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