NEWMAR's public safety PE UL 2524 series power enclosures are ETL listed to UL standards 2524 and 924, providing NFPA compliant battery backup power for all bidirectional amplifiers. Broad offering: 12, 24, and 48 VDC, and 110 VAC; 18 – 100 Ah range.brbr Features:brbr -ETL certified to UL standards 2524 and 924brbr -NFPA compliantbrbr -All required monitoring alarms and indicatorsbrbr -Batteries includedbrbr -NEMA 4 enclosurebrbr -Pre-wired and lightweight for easy one-man installationbrbr -Assembled in USA