Atlas Sound APF-15TUFlanged Emergency Signaling Horn Loudspeaker with 25V/70.7V-15W Transformer is a genius work, It is a voice activated loudspeaker is equipped with a compression driver to provide up to 15 watts of continuous power handling, superior intelligibility and audio conversion efficiency for maximum sound projection and penetration. It is very convenient to use since this series of loudspeakers may be flush mounted or recessed directly into interior/exterior walls or ceilings. It include a built-in 25/70.7V Vari-Tap transformer featuring a screw-driver adjustable, 7-position watt/impedance selection switch. All Wiring terminals covered with a vandal-resistant adapter for control equipment utilizing cable or conduit
For the consumers safety, this unit meet or exceed UL Standard 1480 for Fire Protective Loudspeakers and are capable of operating within an ambient temp. range of 66 C (150 F) to -35 C (-30 F).The all-metal, environment resistant construction and re-entrant acoustic path and makes sure that it has protection against water, humidity, vermin, physical abuse and corrosion. Models are also California State Fire Marshal Listed.