snippet: NEMA-4 PBX Refuge Call Box with Protective Cover for Alpharefuge 2400 Series. Surface, Red Fiberglass Construction, NEMA 4 Watertight, Standard Call Button, PBX Powered. The Alpha Communications® RCB2400RNCOV Refuge Call Boxes are used with the AlphaRefuge™ 2400 Series Area of Refuge system, and are Surface Mount type built into a NEMA rated fiberglass enclosure, suitable for outdoor use.

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