The Ei146RC Optical Smoke Alarm is a mains powered alarm with a 9V Alkaline battery back-up and contains a large, proven optical smoke chamber.
Different alarms sensors work best at detecting different types of fire and so should be sited in appropriate rooms throughout a property. Optical alarms are best at detecting slow, smouldering fire which are commonly caused by sofas or electrical fires.
Fit in: Hallways, Landing, Livings Room, Dining Room