Toa Electronics SC-610T 10 W Paging Horn Speaker with Transformer 

TOSC610T MFR # SC-610T

TOA Electronic's SC-610T 10 W Paging Horn Speaker is a double re-entrant horn with a compression driver paging speaker designed for indoor and outdoor sound system tone signalling and intelligible voice paging. This model includes a built-in 25V/70.7V transformer with screwdriver-adjustable power taps. Easy to install, SC Series speakers can be mounted on poles, walls, or ceilings and double as microphones in intercom talk-back applications.