| http://www.w3.org/ns/prov#value | - Features ??? Approvals include: UL Standard 464, Factory Mutual (FM), Califor nia State Fire Marshal (CSFM), New York (MEA) and Chicago (BFP) ??? Meets OSHA 29 Part 1910.165 ??? High sound output with low current draw ??? Low frequency aluminum shells for better audibility through walls, doors and other structures ??? 6??? and 10??? shell sizes in 12 or 24 VDC models ??? Integral RFI suppression t
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