This unit is can be just a warning light, just a siren, or both simultaneously. There are reasons to use a warning device in these three different configurations, but often, these three configurations are each a unique part number. The HD MCT can do it all in one part number.
Per OSHA, cranes equipped with radio controls or cab controls are required to have an audible or visual warning device to alert personnel that cranes or loads are in motion. Some crane owners prefer one or the other. Why not employ a unit that gives you the flexibility to choose audible, visual, or both in one part number?
Configure your functions in seconds by either connecting or disconnecting wires as illustrated below.
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