Bogen MB8TSQVR Square 8-Inch Metal Box Paging SpeakerBogen's MB8TSQ and MB8TSL speakers feature an all steel surface mounted enclosure with an 8" cone loudspeaker and multi tap 4 watt 70V 25V transformer. The MB8TSQ speakers are suitable for ceiling or wall mounting. The MB8TSL speakers are designed primarily for wall mounting, with front face angled downward by 12. 5 degrees. Models with VR suffix have a recessed volume control at the center of the grille. Features: Rugged all steel surface mounted