MB8TSQVR- Suitable for ceiling or wall mounting - Rugged all-steel surface-mounted enclosure - Full range 8 cone speaker for excellent intelligibility - Compatible with 25V or 70V amplifier systems - Multiple taps at 4, 2, 1, 1/2, 1/4, 1/8 watts - 4-Watt maximum output power - Mounting hardware included (toggle bolts, wood screws and wire crimps) - Knockouts for Wiremold(R) - VR Models feature recessed volume control at the center of front speaker grille