Music/Paging speaker is designed for both indoor and outdoor use with a durable ABS resin enclosure and steel mesh grille. The two-way bass-reflex design features a 4.72" (12 cm) cone woofer, 1" (2.5 cm) dome tweeter and built-in multi-tap transformer with screwdriver-adjustable power taps. A transformer bypass setting allows direct 8-ohm operation. Installation is fast and easy with the supplied mounting bracket or rear panel keyholes for horizontal or vertical surface-mounting. The BS-1030 speakers are backed with a five year warranty.