Smoke Alarm - ATelec - Model FSA-15000 220-240 a.c. lonisation technology 9V battery backup Battery included Interconnectable up to 20 units Complies with AS3786:1993 and AS/NZS3100:2002 Loop terminal provision Hinged/removable backplate for easy installation Separate HUSH and TEST bottons for user friendly operation Power and alarm battery status indication