- 8" Talkback Ceiling Speaker - Exceptional voice and music reproduction - Contains its own built-in amplifier - Flush mounted - 45 ohm speaker -Utilizes standard Cat 3 Cat 5 or Cat 6 cable - Used with talkback page controls - Sturdy steel grille - White epoxy finish - VALCOM POWER UNITS (0) - ACCESSORIES: - VC-V-9914M-5: support bridge - VC-V-9915M-5: backbox - VC-V-9916M: bridge and backbox combination