Smoke alarm for residential applications using photoelectric technology. Clipsal smoke alarms detects hazardous smoke and fire and provides warning to occupants in a home. The device can be interconnected with other 755 series smoke alarms. FireTek range. Main power source 240V a.c. 50Hz, secondary power source 9V d.c. battery with 1-year lifetime. Note: Requires installation by an appropriately licensed electrician.