AW-D306 Addressable Sounder Beacon can give audible and visual alarms after being connected to a DC24V power supply and a bus loop. It can be used with a bus-type fire alarm control panel. After receiving a start command given by the fire alarm control panel following an accident, the Sounder Beacon will begin to work. At this moment, the Sounder Beacon will give a dazzling visual alarm signal and a harsh audible alarm signal ,to remind the persons on the scene of the accident , the fact that a fire has occurred on the site ,quickly and necessity to take related evacuation measures, thus preventing the fire accident from becoming a major one.