The UL22/70 is a complete 2' x 2' UL listed fire signaling device for mass notification & emergency communications providing superior voice intelligibility performance, shallow depth, lightweight, fire-protective signaling device. Components include: an 8C10PAFR - 8" O.D. loudspeaker, 10-oz. magnet, fire retardant loudspeaker and a 4W-70V rotary select transformer. Integral enclosure is 1,412 CID molded fiber. Grille is perforated steel with four (4) seismic tie-off points in a white powder coat finish. Line supervision capacitor is included. No assembly required. UL Listed 1480 (UUMW) TYPE F - As a Fire Protective Signaling device when installed with supplied installation instructions and requirements of NEC/AHJ UL Listed 2043 Suitable for use in air-handling spaces. ASTM E84 - Includes integral backbox that meets/exceeds flame & smoke test w/3 hour burn rating.