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The background noise is automatically filtered during voice paging and firefighter communications
Provides a single zone interface for Protectowire Type CTI™ Linear Heat Detectors
SmartSync operation mode provides this function using a single circuit (two-wire operation)
Silent Knight SK-PHOTO-R-W Intelligent Photoelectric Smoke Detector With Remote Test Capability In Duct DNR/DNRW
STI-7521 Type 4X Protective Cabinet with Backplate and Thumb Lock Clear SCRKLED The background noise is automaticallySTI 7521 NEMA 4X Polycarbonate Cabinet w Thumb Lock Clear Clear polycarbonate cover helps protect against vandalism and damage Allows visibility at almost every angle Exterior thumb lock Includes an additional eyelet for a secondary lock or safety seal Type 4X, UL cUL Approved Mounting hardware and gasket included 8. 875 in H x 10. 875 in W x 3. 625 in D
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