The UL22/25/JB is a complete 2' x 2' UL listed fire signaling device with built-in junction box for mass notification and emergency communications providing superior voice intelligibility performance, shallow depth, lightweight, fire-protective signaling device. Components include: an 8" O.D. loudspeaker, 10-oz. magnet, fire retardant loudspeaker with a 4W-25V rotary select transformer and integral junction box for secure and inspectable connections. 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.