UL 1480 LISTED AND CID2 CERTIFIED TCPA-10 DISTRIBUTED AUDIO SPEAKER. FIVE FIELD-SELECTABLE POWER TAPS THAT RUN OFF OF 25V, 70V, AND 100VRMS AUDIO SYSTEMS. TAPS CAN EASILY BE CHANGED BY TURNING A KNOB. INTEGRATED DC BLOCKING CAPACITOR ALLOWS THE FIRE ALARM CONTROL PANEL TO CONDUCT CIRCUIT SUPERVISION. GRAY